Let me color code it. This right over here is this right over there, and then from that we're going to subtract this business evaluated at 1. Well, when you evaluate it at 1, you get 1 to the third is 1 over 3. You get 1 third. So just to be clear, this is this right over there. And then we are ready to just subtract these fractions, 64 over 3 minus 1 third is equal to 63 over 3, and 3 goes into 63 exactly 21 times. So whatever the units are, the area of this brown area is 21 square units.