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 was reading through his favorite book series . he had 30 books to read total . if he read 6 books each week how many weeks would it take him to finish the series ?
Example Output: 5

Example Input: a pallet of boxes weighed 267 kilograms . if there were 3 boxes on the pallet and each box weighed the same amount how much did each weigh ?
Example Output: 89

Example Input: the razorback t-shirt shop sells their t-shirts for $ 16 . last week they sold 45 t-shirts . how much money did they make last week ?
Example Output:
720