I know that might sound confusing, but we really just have to figure out the areas for both of them. It's really just going to be the ratios. So let's think about that. So there's a temptation to just use this 36 pi up here. We have to remember this was the circumference and we need to figure out the area of both of these circles. And so for area, we need to know the radius because area is pi r squared. So we can figure out the radius from the circumference by saying, well, circumference is equal to 2 times pi times the radius of the circle.