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: after paying 6 dollars for the pie sandy has 57 dollars left . how much money did she have before buying the pie ?

Answer: 63

Question: a vase can hold 5 flowers . if you had 25 flowers how many vases would you need ?

Answer: 5

Question: ned gave away 13 of his video games to a friend . now ned has 6 games . how many games did ned have before he gave the games away ?

Answer:
19