Cool multiplication technique for large numbers...

[cavelamb himself]

An interesting and simple way to multiply large numbers on paper...

http://www.youtube.com/watch?v=owMjAbkU1eE

[Jim Logajan]

cavelamb himself > wrote:
> An interesting and simple way to multiply large numbers on paper...
>
> http://www.youtube.com/watch?v=owMjAbkU1eE

The math in this is even better (classic!):

http://www.youtube.com/watch?v=avDxWrdbjws