To solve a problem using the equation for Kepler’s third law, Enrico must convert the average distance of Mars from the Sun from meters into astronomical units.

How should he make the conversion?

multiply the average distance by 1.5 × 1011
multiply 1.5 × 1011 by the average distance
divide the average distance by 1.5 × 1011
divide 1.5 × 1011 by the average distance