You are given a math word problem and you are supposed to apply multiple mathematical operators 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.

Input: Consider Input: A teacher had 7 worksheets to grade . If she graded 2 , but then another 46 were turned in , how many worksheets would she have to grade ?

Output: 51

Input: Consider Input: At a restaurant each adult meal costs $ 7 and kids eat free . If a group of 13 people came in and 9 were kids , how much would it cost for the group to eat ?

Output: 28

Input: Consider Input: At Billy 's Restaurant a group with 2 adults and 5 children came in to eat . If each meal cost 3 dollars , how much was the bill ?
Output: 21