somebody help me plz im so stuck

I don't want any answers i just don't understand the question and would like it explained in common terms for my benefit please!!!!!!

The wheels on a bike have a circumference of 2 meters. Each time the front wheel makes one complete revolution, the bicycle moves forward 2 meters. in your mown words describe how to work out the distance travelled by the bicycle if you know how many revolutions the bicycle has made.

Hence write down a word formula for the distance travelled.

The formula should start:

distance travelled in m =........

I'm so:confused: