Hello there. To solve this question, we'll have to remember how to calculate the measure of a circumference.
Given a circle with diameter d, as in the following drawing:
The measure of the circumference C can be found by the formula:

In this case, knowing that the rug measures 60 inches across, to find how many inches of fringe Santa needs, we simply plug in d = 60

Using an approximation for pi:

We get that:
