Russian Multiplication - Numberphile
Why the open web links it
Demonstrates ancient multiplication techniques and their mathematical foundations.
Linked by 5 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including hackaday.com, haskell.org, pluralistic.net, clivemaxfield.com, woodash.ru.
Cited in 3 Wikipedia articles, including Numberphile, Johnny Ball, Ancient Egyptian multiplication.