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: Luke was selling his old games . He started out with 39 but sold 19 of them . He packed the rest up putting 4 games into each box . How many boxes did he have to use ?
Example Output: 5

Example Input: At a sale , the cost of a pair of shoes was reduced from 42 dollars to 33.6 dollars . What was the percent of discount ?
Example Output: 20

Example Input: Nancy went to 9 football games this month . She went to 8 games last month , and plans to go to 7 games next month . She paid 3 dollars for the tickets . How many games will she attend in all ?
Example Output:
24