The first and second volumes of "Mathematics" are priced at 300 yuan, which is quite mediocre.

Not too low, not too high.

Li Yuanjia has no intention of challenging the pricing power of books in this era, so even if ordinary paper is used, the cost is much cheaper than the paper used in Xinhua Bookstore, and the final price is still not cheap.

So if there are people who are interested, he really doesn't mind sending out some more.

Not to mention just 20 sets of books, if anyone is really interested in mathematics, even if it is 300 sets of books...... No, Li Yuanjia can be sure that if Datang dares to make mathematics with Tianzhu numbers a "compulsory course", he is even willing to go bankrupt to ensure that all students in the world have a set!

However, the odds are slim to none.

Sometimes Li Yuanjia is also thinking about whether he can think of a way to change the horizontal typesetting to a vertical version, or at least to change it to a right-to-left method.

But after struggling with it a few times, he gave up on this idea.

Let's not talk about how much convenience is left in Arabic numerals, but one thing Li Yuanjia can be sure of is that what needs to be changed is not his own way of writing, but the inherent concepts of the literati.

Difficult!

Hard!

So seeing the surprise on his princess's face, Li Yuanjia said with a smile: "Fengzhu, don't you think it's very convenient for our palace to use this Tianzhu number, bookkeeping, settling accounts, or something?" And the most important thing is that it may not be difficult for the people at the bottom to be greedy, but as long as they are used properly...... Hehe, at least it's hard to be greedy for a lot of money. ”

"yes, yes."

As soon as the thought turned in his heart, Fang Fengzhu immediately understood what he meant.

After learning the Tianzhu numbers for the past few months, Fang Fengzhu also discovered the benefits of the Tianzhu numbers, that is, they are very intuitive, and they can accurately record all expenses and income. If you cooperate with the various incoming bills and bills designed by the king himself, it is really not easy for the people below to fool around!

"Or else...... Can you use it at home? ”

Thinking about it, a thought suddenly rose in Fang Fengzhu's heart.

Although for her, Han Wangfu is the so-called home, but after all, she has only been married for four months, and her habits have not changed, so Fang Fengzhu's first impression of Fangfu is still home!

Looking at Fang Fengzhu's thoughtful expression, Li Yuanjia smiled slightly and didn't say anything.

If you want to change something, the best thing is to start with your side.

Han Wangfu is now barely on the right track, and the stewards up and down have learned the Tianzhu number, and even the old antique Han Chengdu can barely use it. Therefore, Li Yuanjia's next goal is the Liang Guo Mansion of the old father-in-law and the Yingguo Mansion of his uncle Yu Wenshi.

Uncle Li Yuanjia is not in a hurry, sooner or later he will have the final say.

Yuwen Shi and the eldest son of the former Sui Nanyang princess, Yuwen Zen Master, have long been killed, and the current wife is Li Yuanjia's sister, and there is only one daughter, Yuwen Xiu Duoluo. The rest of the Yuwen family is Yuwenshi's younger brother and a concubine......

Anyway, looking at his uncle's current body bones, Li Yuanjia also knows that he may not be able to last a few years.

Although it sounds a little cold-blooded, in fact, Li Yuanjia is really helpless, because even if he has a certain amount of speculation and inference about his uncle's body, all Li Yuanjia can do is to formulate a healthier diet for him, and then strongly recommend that he exercise more.

No matter how much there is, there is nothing to be done.

The only thing Li Yuanjia can do is to take care of his clan sister and little sister after his uncle leaves in the future, and it is not too late to do something when the time comes. Now the old man is at least very sober, and he wants to promote Arabic numerals in the Yingguo Mansion......

Hehe, it's a bit difficult.

So it's better to start with the Liang Guogong Mansion first, which should be relatively easy. First, Fang Xuanling is relatively open-minded in Li Yuanjia's eyes, and secondly, with Fang Fengzhu, the chance of persuasion is also greater......

Just as the two were talking and laughing softly, Han Lucheng suddenly walked in in a hurry: "King, Your Majesty has a will!" ”

"Oh?"

Li Yuanjia was slightly startled, and stood up suddenly: "Fengzhu, you can read the book by yourself for a while, and I will come when I go." ”

After finishing speaking, Li Yuanjia quickly walked to the main hall and saw a small eunuch from the palace.

"Little Chen Li, I've seen the king."

"Well, get up."

After waving his hand to let the little eunuch get up, Li Yuanjia glanced at him, and the little eunuch hurriedly lowered his hand and stood up and said respectfully: "Your Majesty, Your Majesty is scheduled to go to Shiping to hunt in September, and I ordered the king to go with me." ”

"Hunting? Shiping? ”

After listening to the little eunuch's words, Li Yuanjia was stunned for a moment.

Shiping is a place under Yongzhou, in the west of Chang'an, and he knows this. And it's not too far, so it's not too hard to run over.

But going hunting?

The muscles on Li Yuanjia's cheeks trembled twice, and his eyes instantly became gloomy - there is still a war in the southwest border of my Datang, more than 20 states have just experienced a major drought, and there are still people in Bazhou who have just rebelled, killing more than 100 assassins and people, and Lao Li still wants to go hunting?

It's too much!

After receiving the will and waving his hand to let Han Lucheng send the little eunuch away, Li Yuanjia was still very panicked.

Hemp sells horses!

Of course, he didn't pity the common people who suffered from drought or military disasters in his heart, after all, such a big country, and still in this era, it is inevitable. He panicked that it didn't matter if you Li Shimin wanted to go hunting, but why did you have to bring yourself this burden?

That thing Lao Tzu can't, isn't it embarrassing to go?

Don't look at Li Yuanjia, he has to learn riding and archery since he was a child, but it was all superficial, and he never took it seriously at all. As for what it looks like to be diligent in exercising on weekdays, it is also according to the memory of his previous life, running, exercising and exercising other parts of the body, and the knives and guns on the martial arts training ground at home have been touched a few times because of curiosity.

There is also horseback riding...... Is it okay for this king to go out in a carriage?

And......

It's hunting, it's about swords, guns and arrows!

It's true!

These thousands of military horses are full of knives and guns, in case one of them doesn't open their eyes to Lao Tzu, or if they fall or touch something when they are galloping, how can they do it?

I haven't even had an antibiotic these days, and if I really get hurt, it's fate.

After returning to his study with a gloomy face, Fang Fengzhu, who saw his expression, immediately greeted him and asked worriedly, "King, what is Your Majesty's send?" ”

"Not really, it's for me to hunt with him next month."

With a cold face, Li Yuanjia said angrily: "I don't know why Your Majesty wants me to follow...... I've never hunted before! ”

He really has never hunted before, after all, he has been playing with pen and ink since he was a child, so he doesn't know what to do when he goes. Moreover, in these years, there is a golden mouth, and there is no reason for the emperor to refuse when he gives an order.

After listening to his words, Fang Fengzhu blinked his eyes in surprise and said, "King, what's so difficult about this?" Just bring the guards with you and let them arrange it......"