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.

Ex Input:
an industrial machine made 196 shirts . if it made 1 minute to make 7 shirts how many minutes was it working ?

Ex Output:
28

Ex Input:
while heating the wings charlie decided to make metal supports for the wings . if he needs 635 lbs of metal and he has 276 lbs in storage how much additional metal does he need to buy ?

Ex Output:
359

Ex Input:
isabella 's hair is 18 inches long . if she gets a haircut and now her hair is 9 inches long how much of isabella 's hair got cut off ?

Ex Output:
9