It's a Book, Not a Scratch Paper

There is a "book" in the world, a magical tool that can turn what is written on it into reality. The 15-year-old Dazai got a "book", but unfortunately it was just a copy. He can't write anything on it, he can only obtain information about other parallel worlds through it. That's enough. Dazai doesn't care who owns the body, he just wants to use the information he gets and do everything he can to save his friends. The "book" he held also remained blank, silently conveying information to him. Until one day, writing appeared on this "book" for the first time: 0.75X-3=2.1 0.75X=2.4 X= x= x=3! Dazai, who watched the entire calculation process:... Ah, miscalculation. * Chen Jianhe, 13 years old, sixth grade. His ambition is to first enter the best junior high school in the area and then go all the way to the best university. Then find the best job, get promoted and get a raise, become CEO, marry a rich and handsome man, and reach the pinnacle of life. She had just picked up a treasure on the playground during her physical education class. It was a book with writing that would disappear automatically. It's a perfect piece of scratch paper, and I'll hopefully use it all the way to college. Chen Jianhe was overjoyed and used it to make some hearty calculations in the math quiz. Then the teacher called her to the office after class and asked her how "2.1+3=2.4" Came about and whether she had invented a new mathematical law. Chen Jianhe was speechless and decided to work hard. The specific manifestations of striving for self-improvement are: doing math problems on the "book", sharing stories with classmates, playing backgammon and drawing puppies. * Dazai, who read the "book" in his arms every day, realized that something was wrong. Even if you don't get the math questions right, why are you still drawing a dog? Target him? *Mainly comprehensive literary field, with a large time span *Imaginary, having nothing to do with any real organizations, groups, or characters *Screenshot taken on 25.8.19 Motto: Everything is possible with hard work