hint : there is 4 quarts in a gallon . all you have to do is multiplyin gallon there is 4 quarts.
If they make 35 times the lemonade recipe and each make 2 quarts so 35*2 =70 now divide 70 by 4,So there is 4 quarts in one gallon so times 2 by 35 then divide by 4 there is your answer.