Question

A snowboarder traveled at a speed of 12 meters per second for 15 seconds. How far did the snowboarder travel?

Answer 1

multiply 12 x 15 = 180 meters

Answer 2

180 meters

Since he was going 12m/s, you can set up an equation like so:
12 m / 1 second = x m / 15 seconds
Cross multiply and there's your answer.