"Before answering this question, I will ask you, what is heaven and what is earth?" Zhang Miao did not answer directly, but asked.

Zhang Miao knew that in order to prevent some people from refuting randomly, he had to define concepts first and could not confuse philosophical issues with science, so that he could not explain even if he had nine mouths.

"Well..." Kuai Yue opened his mouth, not knowing how to say it.

For many people, heaven is a formidable existence, and people’s feelings for heaven are very complicated. But what exactly is heaven? How can we say it clearly in one sentence?

"The sky is high and above, which is beyond the reach of ordinary people, how can it be considered its height? Brother Yidu, shouldn't you use such a problem to make such a young man difficult?" Liu Biao shook his head and said to Kuai Yue. Of course, it was also to rescue Kuai Yue. After all, you can't even explain the sky clearly. How can people calculate how high the sky is?

"Yes, yes, this question is too complicated." Kuai Yue said with a wry smile.

"Haha, I know a little about this question." At this moment, Wang Can walked out with a laugh.

"According to the Sanwu Calendar, Yang Qing is the sky, Yin turbidity is the earth, Pangu is in it, and nine changes in one day, the gods are in the sky, and the holy is in the earth. The sky is one zhang high, the earth is one zhang thick, and Pangu is one zhang long, so eight thousand years old. The number of days is extremely high, the number of earth is extremely deep, and Pangu is extremely long. The number of numbers starts from one, stands from three, becomes five, flourishes from seven, and is in nine, so the sky goes nine thousand miles away.

Therefore, the height of the sky and the thickness of the earth are all ninety thousand miles away. As for how far the sun and the moon are from us, the sun and the moon are in the sky, the height of the sky is, the sun and the moon are from us!"

Wang Can quoted the scriptures and talked freely, which attracted the praise of the scholars in the audience.

"Wang Zhongxuan is very knowledgeable about the past and the present, and he is a great talent." Liu Biao smiled and Kuai Yue nodded with a smile.

Zhang Miao shook his head slightly: "It's wrong, Brother Zhongxuan, what you said is to quote the Sanwu Calendar. What is the Sanwu Calendar? It's just myths and legends. In ancient times, people did not know the answer to many phenomena, so they put them in myths. How could they use it as the standard?"

Wang Can smiled and said, "Zhang Xiaolang, can you know how high the sky is?"

Zhang Miao said: "Of course. But before calculating the height of the sky, you must first know what the sky is? The so-called sky is just a thick gas covering the surface. When we in and out, the wind and clouds change, the wind and rain are all evolved by gas. The closer we are to the ground, the denser the gas is, the farther we are from the ground, the thinner the gas is. At the extreme of the sky, the gas is sparse and invisible. According to the gas estimate, the height of the sky is about 32,000 miles, which is not far away than 90,000 miles."

"The saying that the sky is thick gas is fresh." Liu Biao smiled at Kuai Yue. As for what Zhang Miao said about the sky being 32,000 miles high, it was just a joke.

"Wait, Zhang Xiaolang, these 32,000 miles are really calculated? How are they calculated?" Wang Can asked hurriedly.

Zhang Miao said: "We need to first establish a mathematical model, then estimate the gas density of each layer, and of course, we also need to know the radius of the earth, and then use mathematical formulas to calculate it."

Wang Can was stunned when he heard this. What mathematical model, what gas density, what earth, what radius, what are these? None of them understood!

Zhang Miao also knew that it was too difficult to let the ancients accept what they knew well. To prove how thick the atmosphere is, people must first believe in the existence of air, and start with the earth being a ball. These are very difficult alone. After thinking about it, he decided to end the topic as soon as possible. After all, I came to the stage to write poems to attract the attention of Liu Biao and other senior officials in Xiangyang, so as to sell honey candles at a high price, rather than just to show off! I can't even have enough food to eat, so how can I have the strength to popularize scientific knowledge for the ancients?

"Of course, this kind of calculation sounds simple, but it is extremely complicated. You need to have enough mathematical knowledge and have a deep understanding of astronomy and geography, which cannot be explained clearly in a short while. Brother Zhongxuan, if you are interested, let's discuss it slowly in the future. Today I can talk about some very convenient mathematical knowledge first. This was invented by me alone, but it requires a brush and ink for demonstration." Zhang Miao said.

Liu Biao waved his hand, and some people gave him a pen and ink and a large piece of white silk.

Zhang Miao was stunned for a moment when he looked at the white silk, and then he realized that although the paper appeared at this time, it may be because of the poor quality, but it was not popular. People mostly use bamboo slips to write, and a few use sheepskin or silk cloth. Well, they can do papermaking in the future, and maybe they can make a lot of money!

He knelt down, spread the white silk on the ground, picked up the brush, and Zhang Miao started writing and painting on the white silk. Many people on the stage couldn't help but stand up and stretched their necks to watch. Only high-ranking officials such as Liu Biao and Kuai Yue valued their own identities, and although they were curious, they still sat in their original position.

"What are these?" Wang Can asked, pointing to the winding things drawn by Zhang Miao.

"This is the mathematical symbol I invented. 1 corresponds to Chinese characters 1, 2 corresponds to 2,..." Zhang Miao said while writing the corresponding Chinese characters under each Arabic numeral.

"If we use my mathematical symbol to count, it is much more convenient than using Chinese characters. For example, if we have a population of Han, we can say that there are 24532216 people, if we use this mathematical symbol, we can write it as 24532216.

The most convenient thing is that using mathematical symbols can easily do addition, subtraction, multiplication and division operations. For example, when adding these two large numbers, generally, the calculation requires a calculation chip and it takes a long time to calculate it. However, adding mathematical symbols can easily get the result."

Zhang Miao was talking and writing, talking about the addition and subtraction operations that elementary school students in later generations knew, but in the ears of Wang Can and others, it was particularly magical. When he saw Zhang Miao easily add two very large numbers to get the result, many people exclaimed.

Most scholars here have learned arithmetic, but their calculations are all based on the help of calculations. Some complex calculations often take a long time to fiddle with. It is shocking to see that Zhang Miao's calculations are so easy.

"Everyone, whoever does not solve the arithmetic problem can be said on the spot. Please Zhang Xiaolang calculate." As if he was about to make things difficult for Zhang Miao, Kuai Yue said with a smile.

"I have a question. Can you ask Zhang Xiaolang to calculate it using your algorithm?" Wang Can smiled, "Say that everyone raises money to buy a property, each person pays 8 yuan and 3 yuan to pay, and each person pays 7 yuan and 4 yuan to pay. Ask the number of people, what are the prices?"

After listening to Wang Can's question, many scholars present cheered up and began to concentrate on calculations. Some closed their eyes and pondered, while others picked up branches and broke them as calculation foundations. Some scholars who were not good at arithmetic looked at Zhang Miao, wanting to see how he answered.

Zhang Miao smiled. Can a primary school student in another time and space calculate it?

When I picked up the pen, I quickly listed two equations and solved them in a moment.

"Seven people, the price is 53 cents, Wang Jun, can I calculate it correctly?" Zhang Miao said with a smile.

"Oh?" Wang Can was stunned for a moment. Is it so fast? When I first looked at this arithmetic problem, it took me a long time to solve it.

"I admire you all." Wang Can sighed with his hands.

After a while, a scholar finally figured out the answer and said in surprise: "It turns out that there are seven people, fifty-three cents!"

"I have a problem too!" Some scholars were dissatisfied and thought that Zhang Miao had just happened to see the problem.

However, in Zhang Miao's opinion, the questions he raised were still at the level of elementary school students, and it took less time to solve them.

"I have a question too!" Another scholar shouted loudly.

One scholar after another came out and asked arithmetic problems that they thought were difficult. Even some big shots sitting on the stage stood up and asked their own questions. It can be seen that many people have a lot of research on arithmetic. However, in Zhang Miao's opinion, their problems did not exceed the junior high school level at all, and the difficulty was too low.

When another scholar asked about area questions raised by Zhang Miao were easily solved, no scholar stood up to ask questions. All scholars looked at Zhang Miao with admiration, and finally recognized his level!

So, many people finally believed that Zhang Miao was really good at arithmetic!

"In the way of arithmetic, you can be called a great master of the previous generation, and you can establish a sect. Can admire you!" Wang Can sighed with his hands.

When Zhang Miao answered the question, a servant wrote a pen to record it while he was beside him, and then sent the transcription results to Liu Ping. Looking at the curved character formula and listening to Zhang Miao's answer, Liu Biao, Kuai Yue and others were also amazed.

"Eunuch, Zhang Miao is smart and has a unique insight into arithmetic. It is better to let him work in the state school. Is it better to teach the scholars arithmetic?" Kuai Yue suggested to Liu Biao with a smile.

"This..." Liu Biao hesitated a little. Is this really good if he asked a 14 or 15-year-old boy to be a professor in the state school?

"The so-called master is the teacher. Zhang Miao's attainment in arithmetic is enough to be the teacher of everyone, and I think it is OK." Song Zhong also said.
Chapter completed!