I've known how to do long-form multiplication for 25 years. 568 x 19, for example. It only occurred to me today when teaching my still-too-young son how to do this sort of multiplication _what_ we're actually doing when we do it. ![[IMG_18C79AC70947-1.jpeg]] The standard process we were taught is **literally** just breaking the bottom number up into components, then adding them back together. **** # More ## Source - Realizing something while teaching something. ## Related - Other obvious things that I didn't realize