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.

Ex Input:
Sara grew 43 pumpkins , but the rabbits ate 23 pumpkins . How many pumpkins does Sara have left ?

Ex Output:
20


Ex Input:
There are 77 apples in a box . Louise has 9 apples in a bag . Scott takes 75 apples out of the box . How many apples are left in the box ?

Ex Output:
2


Ex Input:
Virginia has 16 eggs and 8 Skittles . If she shares the eggs among 4 friends , how many eggs does each friend get ?

Ex Output:

4