Magic Calculator

Impress your friends with your ability to magically know the answer to multiplying several 3 and 4 digit numbers instantly. Able to reset the trick in an instant, using certain button, so you can do this in a club setting working between tables and have a different solution ready to go. Use certain keys to set the new answer and to also switch back to a normal calculator. Here is a link to a trick you can do first in normal calculator mode. http://www.webenefitall.com/trick-3-4-5-digit-numbers/