After Qu Jiang took away the relevant theoretical principles of telescopes and glass from the kiln, Xia Yanqing was still a little worried.

When she was calculating, she thought of Xia Xiaoniang's shallow roots.

Even if she has unusual intelligence and talent as the foundation, she can't learn how the ancients used arithmetic chips to add, subtract, multiply and divide.

She had a book on arithmetic on hand, but for her, it was second only to the Book of Heaven. In a short period of time, she couldn't learn at all.

So, she found all kinds of excuses, just said that it was a whim, and she wanted to calculate to see if there was a law to follow, so she listed the equation and asked Xia Zixi to calculate.

After watching Xia Zixi's calculations, Xia Yanqing was very sure that he was in conflict with the counter, and he was dizzy when he saw the count, and he was basically in a situation where he didn't know how to count.

This backward calculation method must be improved, and she may have to come into contact with calculation in the future, and she can't always ask her brother for help every time.

The first step is to change the writing method, the ancient method of recording 38,600 or so is simply complicated...... Well, the ancients were used to it and didn't feel resentful.

But she couldn't make it......

Arabic numerals, she didn't dare to make them. She was afraid that before she was ancient, she would bring in the kind of thing called foreign yards from the outer lands.

At that time, how could she justify herself? If it's not clear, if it's used by someone with a heart, it's a big trouble.

Let's take it step by step, first use the Chinese characters one, two, three, four instead of Arabic numerals, and the others can be copied.

After that, there is the vertical form of addition and subtraction, which is the same as the digital recording method, and does not need to be explained. I only said that I didn't understand the principles of arithmetic, and I just tried to make it indiscriminately for the convenience of calculation and writing.

Then, by accident, it actually succeeded.

Anyway, after Xia Zixi was surprised, he believed it. At first, she was just a child's nonsense, but after a few more attempts, she was conquered by that simple and simple way of recording.

There is also the vertical form of addition and subtraction, try to calculate it a few times, Xia Zixi is almost stunned.

If it weren't for the fact that Xia Yanqing was developing clairvoyance, which was a controlled item in the imperial court and the army, Xia Zixi would have promoted this calculation method to Yunshan Academy.

Let's do these simple things first. Xia Yanqing believes that as long as she throws this brick out, as long as the people engaged in calculation can see the convenience and convenience in it, she will definitely be able to study the multiplication and division, and even the formula of the multiplication square.

In the long run, thanks to the efforts of our ancestors and sages, the calculation methods of Middle-earth, except that the writing is not as smooth as Arabic numerals, can stand on top of the world in other aspects.

Qu Jiang believes it, it only depends on whether the emperor believes it or not.

As long as the emperor can believe her words, others will not be able to question it.

This is a matter in the field of mathematical research, and in general, people who are interested in scientific research are more interested in the truth of the facts, and they are interested in progress and change, unlike those who are obsessed with reading the books of the sages.

It is precisely because of these people that there will be continuous progress in science and productivity. Therefore, people who care about the calculation method will not spend their minds questioning whether the calculation method is reasonable.

And those who put their minds into this don't care about mathematics and scientific research.

Once everyone accepted this simple method of arithmetic and writing, some people who dedicated themselves to scientific progress perfected mathematics and calculations.

Does this give Middle-earth an opportunity to revolutionize? If it is supplemented by the development of experimental science, what glory, what peak, what standing on the top of the world, will there be a chance to achieve?

After all, the improvement of her set of calculation methods is carried out on the basis of the existing one, and there is also Shao Yi as a partner, so Xia Yanqing is a little worried, but it is not serious.

It was getting late, and when she got home, Xia Ke's father and son, who were doing errands outside, had already come back one step ahead of her.

In Mrs. Jiang's room, she saluted her parents, and after meeting her brother and sister-in-law, the two sisters-in-law, Gao, went to the kitchen to supervise the dinner situation. Sister-in-law Yang took the child to wash her hands and prepare before cooking.

The two left, Xia Ke glanced at Xia Yanqing, and said very casually: "Before going down, the emperor summoned his father and asked about the operation of Yanqing's workshop. It is said that your glass industry has made great achievements in the prosperity of the craftsmen of the imperial court, and now the time is too tight, and the reward for you will be arranged after the year. ”

Yes? Is it so formal? Parents were also notified in advance? Xia Yanqing is a little overwhelmed.

Mrs. Jiang was also really stunned.

Xia Zitang was overjoyed and said, "Really? It's a good thing, but it's a pity that it's a year old. If it's a year ago, together with the New Year, let's really celebrate. ”

Xia Ke continued: "The emperor also praised Zixi for his insightful and real talent in mathematics, and asked Zixi if he had any intention of joining the scholars. ”

"In terms of numbers, that's a little sister...... Alas......" Xia Zixi understood what the emperor meant in an instant, and after saying half a sentence, he stopped and looked at Xia Yanqing.

My little sister doesn't have the same little character as other ladies, but this is not an ordinary trivial matter, if the little sister's simplification and calculation in terms of magic can be further developed, maybe it will be famous in history in the future.

And he, now being forced by the emperor to steal the exploits of the little sister.

Xia Zitang smiled sheepishly, this matter must be related to the development of clairvoyance, and he can't explain it. The emperor didn't want to bury Xia Yanqing's credit, so he could only put it on the head of Xia Zixi, the most suitable Xia Zixi for the Xia family.

He knew that his brother and would not want to take advantage of the merits of his reputation. However, the emperor has spoken, what can he do?

Xia Yanqing naturally understood what Xia Zixi meant, she didn't say anything, she just spread her hands helplessly, and said: "I'm all whimsical nonsense, but fortunately, the second brother doesn't dislike it, and is willing to help me do the math." I don't know anything, I don't understand anything. ”

As he spoke, he also leaned sideways to Xia Zixi, and said in a quiet voice: "Fortunately, the second brother is on top, if this matter is really done by me, I'm afraid it will be a big trouble." ”

Xia Ke nodded, ironing in his heart, his daughter is really smart and wise, and she sees many things very lightly and openly. Only by not caring about trivial things can we have the time and energy to do so many shocking things, right?

When Mrs. Jiang heard Xia Yanqing and Xia Zixi's whispers, she couldn't help but worry, "It's so decent, how can there be trouble?" Is it related to the glass items that Yanqing tried to make a few days ago? ”

Xia Ke and Mrs. Jiang sat across a kang table, heard the worry in Mrs. Jiang's words, and comforted: "That incident has nothing to do with Yanqing and us in the future, let's treat it as if it didn't happen." The emperor created the glass industry because of Yanqing, so that people can also bathe in the sun in winter, and she will be rewarded after the year. It's a great event. ”