Depending on whether you choose addition or multiplication, you will see either an addition problem or a multiplication problem on the screen. However, the digits have been scrambled. To rearrange the digits, click on one digit, then click where you want it to go.  The two digits will change positions. Continue moving tiles until you solve the problem.

Note: Many problems will have more than one solution, so there is no hint mode in this game, since the site has no way of knowing which solution you're working toward.