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.

Example Input: Edward made 37 dollars mowing lawns over the summer . If he spent 21 dollars buying new mower blades , how many 2 dollar games could he buy with the money he had left ?
Example Output: 8

Example Input: Vanessa and her friends were recycling paper for their class . For every 9 pounds they recycled they earned one point . If Vanessa recycled 20 pounds and her friends recycled 16 pounds , how many points did they earn ?
Example Output: 4

Example Input: Bianca was organizing her book case making sure each of the shelves had exactly 8 books on it . If she had 5 shelves of mystery books and 4 shelves of picture books , how many books did she have total ?
Example Output:
72