Hacker News new | comments | show | ask | jobs | submit login

The videos only show the technique using small digits. For the larger digits this method quickly becomes cumbersome.

Latttice multiplication is much better for large numbers and deals with a lot of the carrying of overflowing digits which occurs in both normal and "Japanese" multiplication.


edit: spelling

yes, there are no '57 * 86' examples, which would be counting intersections for quite some time.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | DMCA | Apply to YC | Contact