You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.

Example Input: Sam has 86 yellow and 20 green marbles . Joan took 25 of Sam 's yellow marbles . How many yellow marbles does Sam now have ?
Example Output: 61

Example Input: How many cookies would you have if you had 37 bags of cookies with 19 cookies in each bag ?
Example Output: 703

Example Input: There are 5 oak trees currently in the park . Park workers will plant 4 oak trees today . How many oak trees will the park have when the workers are finished ?
Example Output:
9