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.
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Question: robin 's hair was 15 inches long . if she cut off 5 inches how long is her hair now ?

Answer: 10

Question: a package had 18 cookies in it . after eating some there were 9 left . how many were eaten ?

Answer: 9

Question: the clown blew up 47 balloons . then he blew up 13 more balloons . how many balloons does the clown have now ?

Answer:
60