Birdwatch Note Rating
2023-05-19 13:32:38 UTC - NOT_HELPFUL
Rated by Participant: B9EE38A3C151321686B5CBE2C490FCF9BD31AA8107D47ED55F5A4320E201C202
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Original Note:
This has been called as “Japanese calculation”, but it is called as “Ancient Indian method” in Japan actually. And called as “Chinese stick method” in internet, too. The is a movement to clarify its roots, however the correct answer has not been reached as attached links. https://math.stackexchange.com/questions/877120/what-is-the-origin-of-how-the-japanese-multiply-line-multiplication https://hsm.stackexchange.com/questions/9902/what-is-the-origin-of-the-chinese-stick-multiplication-method
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