Well, to answer this question, how many gallons of water were in the hot tub before it started to leak, that's answering the same question as how much total hot water drained out. So how much drained out? And to think about that, we can just kind of go back to what we knew before we learned about calculus. If I have something happening at a fixed rate, so let's say that this is gallons per minute. So this is still the same context, I guess you could say. This is time in minutes. Now let's say things are draining out at a constant rate.