So that's that. And then we could have the integral from c to b of f of x dx. And that, of course, is going to represent this area right over here. Well, the one thing that probably jumps out at you is that the entire area from a to b, this entire area, is just a sum of these two smaller areas. So this is just equal to that plus that over there. And once again, you might say, why is this integration property useful? That if I found a c that is in this interval, that it's greater than or equal to a and it's less than or equal to b, why is it useful to be able to break up the integral this way?