Question

Find the number of different t-shirts available if they come in 6 colors, 5 styles, and 4 sizes.

Answer 1

Each of the 6 colors can be combined with each of the 5 styles, giving 6 * 5 combinations. And each of the 6 * 5 combinations can be combined with each of the 4 sizes, giving a total number of combinations as follows:
\[\large 6\times5\times4=you\ can\ calculate\]