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: There are 3 short trees and 6 tall trees currently in the park . Park workers will plant 9 short trees today . How many short trees will the park have when the workers are finished ?

Output: 12


Input: Consider Input: Each CD rack holds 8 CDs . A shelf can hold 4 racks . How many total CDs can fit on the shelf ?

Output: 32


Input: Consider Input: Isabella ’ s hair is 18 inches long . By the end of the year her hair is 24 inches long . How much hair did she grow ?


Output: 6