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.

Input: Consider Input: A box of books weighs 42 pounds . Each book weighs 3 pounds . How many books are there in the box ?

Output: 14


Input: Consider Input: The clown blew up 47 balloons . Then he blew up 13 more balloons . How many balloons does the clown have now ?

Output: 60


Input: Consider Input: There are 38 books on the shelf . Marta put 10 more books on the shelf . How many books are on the shelf now ?


Output: 48