Find The Area Rectangle & Square Online zombie Game - math game for 1st, 2nd, 3rd, 4th, 5th, 6th grades. To find the area of a square or rectangle you have to multiply the length by the width. The area of a square can be used to calculate the area of a sports complex, field etc. This game is suitable for Halloween since it contains zombies in a graveyard. It is interactive hence students get to teach themselves in the process.