So 20, oh sorry, not 20 gallons per minute, 20 minutes times two gallons per minute, two gallons per minute times 1 1⁄2. Times 1 1⁄2 gives us the area under this triangle. So that is going to be 20 gallons. 20 gallons, we see that the units work out nicely. And so that's essentially how much has drained out in the first 20 minutes. And then this green area is going to be 40 minutes, 40 minutes times 10 gallons per minute, times 10, and actually maybe the units, since I'm breaking it up in this strange way, I'll just multiply, I'll just figure out this area in a unitless way. So 40 times 10, which is equal to 400.