Do you know that you can play Tetris game with Canon calculators? By entering “153349” and then press “+ -” at the same time, you can play a very simple form of the classic video game Tetris. It’s real or fake? I have no idea because I have no Canon calculator to test it out but it looks cool.

Watch the sample in the video below and take out your Canon calculator to try; some people said only new models of Canon calculator can do it…