If you imagine a quarter that has an infinitely thin depth right over here, so it's going to be dx. And so the volume of our truffle with the cone carved out is going to be this integral minus this integral right over here. And we could evaluate it just like that, or we could even say, OK, we could factor out a pi out of both of them. Actually, there's multiple ways that we could write it, but let's just evaluate it like this, and then I'll generalize it in the next video. So this is going to be equal to the definite integral from 0 to 1. We take the pi outside. The square root of x squared is going to be x dx minus the integral.