Please help me answer this problem T^T I don't know how to solve it.?

1) The mean distance of the earth from the sun is 1.496 x 10^8 km, which is defined as one astronomical unit (au). The mean radius of the moon orbit around the earth is 0.002570 au. The mean radius of the earth at the equator is 6378 km. The distance of the earth to the moon is the equivalent of how many trips around the cirference of the earth at the equator?