A great effect with a simulated calculator that involves quite some audience participation! The magician shows two cards in his hand. one of them is white on both sides and the other has a calculator printed on it. The magician presses some button and claims that he has entered a prediction into the memory of the calculator. It is shown that the calculator shows 8888 when it is laces face down on the table. Four three digit numbers are named and a spectator is asked to add them up. When this is complete the ‘calculator is turned around and the number in the display now matches the result. Comes complete with several other presentation ideas.