The image on the left is from a Japanese mathematical “wasan 和算” text, showcasing grid-based calculations using “sangi算木” counting rods, a method greatly influenced by the Chinese SuànChóu 算籌 system. The upper,最新話公開中🤛】 『この国はもう終わりだよ~日本脱出して異世界でや.. | スタジオナンバーナイン【公式】 さんのマンガ | ツイコミ(仮),The image on the left is from a Japanese mathematical “wasan 和算” text, showcasing grid-based calculations using “sangi算木” counting rods, a method greatly influenced by the Chinese SuànChóu 算籌 system. The upper,The image on the left is from a Japanese mathematical “wasan 和算” text, showcasing grid-based calculations using “sangi算木” counting rods, a method greatly influenced by the Chinese SuànChóu 算籌 system. The upper,究極難問 漢字ジグザグフレンズ Vol.2 | パズルフレンズ