Well because 1st we have to remember that 1 cup = 0.5 pints, which is like 1/2 And also, remember that if there were 30 pints, then that would = to 60 cups, but in this case we get 64, which of course is seen bigger because of 4 cups more.
So yes as i said in the beginning, 64 IS bigger than 30 Pints because if it were equal, it would then have to be 60 Cups instead of 64.
