Answer:
13 gallons
Explanation:
Don't know if this will help you at all but here you go. You can do the king greedy method. You draw a big G and you draw 4 Q's inside representing there are 4 quarts in a gallon. then you draw 2 p's inside each q representing there are 2 pints inside a quart then you give each pint two crowns witch mean there are 2 cups in a pint.