I've got a very helpfull system for making calculations, more exactly: multiplying. How do you calculate large multiplications like e.g. 1538x483 Takes some time, isn't it? Well, I found this system for solving the problem and it's great. Whatch this, amazing: http://www.metacafe.com/watch/308408/Easy Multiplying. Don Greetz Domino Edit: I see it has been removed today... strange.