This is going to be three times, the height here is three, f of seven is three. So that is nine square units. And then here, this is three, the width is three times the height, f of 10 is five. So three times five, which gets us 15. And so our approximation of the area would be summing these three values up. So this would be 24 plus, let's see, nine plus 15 would give us another 24. So it's 24 plus 24, it gets us to 48.