You are given a math word problem and you are supposed to apply a single mathematical operator like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

for the walls of the house he would use 9 large planks of wood . if each plank of wood needs 8 pieces of nails to be secured how many nails does john need for the house wall ?
72

the central city zoo has 45 chimpanzees . every day the chimps eat a total of 72 bananas . next week the zoo is moving 18 chimps to a new cage . how many chimps will stay in the old cage ?
27

last week fred had 46 dollars and jason had 13 dollars . fred washed cars over the weekend and now has 57 dollars . how much money did fred make washing cars ?

11

