well there is 4 cups in one quart. so times 9 by 4 which equals 36.
your answer should 36.
look at this story it might help
once upon a time in the kingdom of Galensia there was four Queens, each queen had 2 Princesses, each princesses had 2 Children. THE END. (Key- Galensia = 1 gallon, Queens = 4 quarts, princesses = 2 pints, children = 2 cups.)
hope this helped if not look up gallon man.