A store sells T-Shirts in 6 colors, 4 designs, and 3 sizes. Find the number of different T-shirts available.

For this kind of problem, you want to multiply each of the numbers of options together. You'd say, there's 6 colors for each of 4 designs, which in turn are each in 3 different sizes. That's 6 * 4 * 3, which is 72 different T-shirts.