Book (Practical) Children's book The number of worlds that I want to talk about tomorrow

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Children's books
After 5 seconds, the series "I want to talk tomorrow" is started, full of interesting stories that I want to talk to someone the next day! In this book, 50 themes that I unintentionally like the world of mathematics and numbers such as "If you break a newspaper 42 times, it will reach the moon" and "There is about one person in the class who has the same birthday" are included. Manga that shows columns and the lives of mathematicians are also included.