I'm having serious problems solving this problem....

A golden rectangle is a rectagle whoes length is approximately 1.6 times the width. The early Greeks thought that a rectangle with these dimensions was the most pleasing to the eye and examples of the golden rectangle are found in many early works of art. For exampls, the Parthenon in Athens contains many examples of golden rectangles. Mike Hallaham would like to plant a rectangle garden in the shape of a golden rectagnle. If he has 78 feet of fencing available, find the dimensions of the garden.

what is the width of the garden and the length?