Multiplying large numbers

[mister_e]

I'll second and third the Lookuptable stuff. Sometimes time saving AND, of course, codespace is more important than messing with math. An external EEPROM is cheap and a table made in EXCEL or else can be easily done and dump in the EEPROM when saved in the correct format. I'd never thinking to use any of math processor as now. Maybe because what i do don't require it or i can't trust anybody else than me... but that's another story.

Good luck!