[Sacajaweau]

I find this method in historical surveying data, circa 1800.

[antaresequity]

too many beers tonite see lower post sorry

No im not a school teacher...i was trying to convey a method that I use for multiplication beyond the tables

like for instance this simple example 17 x 28

thats the same as 10 x 28 or 280 and
7 x 28 which is 7 x 20 + 56

which is 280 + 140 + 56

when you multiply it is a ton quicker that way

break it into memory sized chunks that are easy base ten units