The Ming Dynasty Observer

One square kilometer is 1,500 acres. One kilometer times one kilometer equals 1 million square meters. One acre is 667 square meters. One million divided by 667 is 1,500. Ten square kilometers is 15,000 acres. I will teach you primary school mathematics for free. I hope you will not follow the rules in the future.

Not bad, not bad. It seems to have been carefully thought out. It's not like the other garbage that is just plagiarism and thieves and written about history.

Thank you for your hard work! No matter what the reason is for stopping the update, I would like to thank the author for bringing me such a good work. ——From a twenty-year-old bookworm who only reads books and almost never comments.

It's very good. Why are so few people watching it? Come on, author.

This book is very well written, and the author is very careful! Come on!

Beautifully written, more people should read it Come on, write well~

I have been reading this book for ten years, and this is the second time I have given it a five-star review. The last time was Ke Shanmeng's novel a few years ago.

Not bad, the theme is ok

I still think it looks good after watching it again

This is a seriously underestimated book, but unfortunately it has been discontinued. The author's writing style is better than 90% of the authors in the bookstore.