Negative 18 over 5 is the same thing as negative, let's see, 5 times 10 is 50, plus 40. So that's going to be negative 90 over 5. So this whole thing has simplified to equal to pi times 243 over 5 minus 90 over 5, which is equal to pi. I deserve a drum roll now. This was some hairy mathematics. So 243 minus 90 is going to be 153 over 5. Or we can write this as 153 pi over 5.