So the area of the washer, if it didn't have a hole in the middle, would just be pi times the outer radius squared. It would be pi times this radius squared. That we could call the outer radius. And since it's a washer, we need to subtract out the area of this inner circle. So minus pi times inner radius squared. So we really just have to figure out what the outer and inner radius, or radii, I should say, are. So let's think about it.