You are given a math word problem and you are supposed to apply a single mathematical operator 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: a chef used 39 cherries to make a pie . now he has 58 cherries left . how many cherries did he have before he made the pie ?
Example Output: 97

Example Input: the store has cd 's and dvd 's that you need . how many packs of dvd 's can you buy with 132 dollars if 1 pack costs 12 dollars ?
Example Output: 11

Example Input: jake has 34 fewer balls than audrey . audrey has 41 balls . how many balls does jake have ?
Example Output:
7