Jason is making his favorite ultimate chocolate chip cookies for a huge party at school. He just finished dropping rounded tablespoons of dough on his cookie sheet and was able to fit 15, which will make 15 cookies. The problem is that he needs to make 64 cookies for his party, and his oven can only fit one cookie sheet at a time. How many times will he have to put a cookie sheet into the oven to make enough cookies?
+591 64/15=4 r 4
so he has to do it one extra time. so the answer is $\boxed{5}$
