Olympiad Geometry · Hard problem

The inside edge of a running track is a $100$ m by $60$ m rectangle with a semicircle attached to each $60$ m side (the semicircles have diameter $60$ m). The track is $10$ m wide all the way around, so its outside edge is the same kind of shape, $10$ m farther out everywhere. Find the area of the track. Leave your answer in terms of $\pi$.