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: Roger is at the library helping put away books . There are 14 book to put away total but a librarian takes 2 of them and leaves Roger with the rest . If he can fit 3 books on a shelf , how many shelves will he need ?
Example Output: 4

Example Input: While on vacation , Rachel took 6 pictures at the zoo and 9 at the museum . If she later deleted 11 of the pictures , how many pictures from her vacation did she still have ?
Example Output: 4

Example Input: Kaleb was selling his old games . He started out with 76 but sold 46 of them . He packed the rest up putting 5 games into each box . How many boxes did he have to use ?
Example Output:
6