I make some basic mathematics learning materials. I publish them on YouTube. This time I got a strange comment. ``Why the title of this video is ``basic division''? It is about subtraction.'' I made this video in Japanese, my video title was in Japanese (基本のひき算), but the comment was in English. I was puzzled, ``ひき算'' means ``subtraction'' instead of ``division''. I found out that the person who wrote the comment used Google translate. When I input ``ひき算'' to the Google translate, it indeed translates it as ``Division''. Japanese has Kanji and Hiragana (and Katakana) for writing and Hiragana is a phonetic notation. My basic subtraction video is for first or second class students, thus I use Hiragana (phonetic notation). If I put the Kanji notation (引き算) to the Google translate, it is correctly translated to the subtraction. If I use all phonetic notation (ひきざん), then Google translate outputs ``Hikiman'', which I don&#
Mathematics, programming, and a little bit of my life.