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: while playing a video game victor lost 14 lives . now he has 2 lives . what 's the difference between the number of the lives that victor lost and now ?
Example Output: 12

Example Input: mike has 64 action figures he wants to display . if each shelf in his room can hold 8 figures how many shelves does he need ?
Example Output: 8

Example Input: for the fifth grade play the chairs have been put into 27 rows with 16 chairs in each row . how many chairs have been put out for the play ?
Example Output:
432