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: Carlos has 58 blocks . He gives 21 to Rachel . How many blocks will Carlos have ?

Output: 37


Input: Consider Input: There are 4 walnut trees currently in the park . Park workers will plant 6 walnut trees today . How many walnut trees will the park have when the workers are finished ?

Output: 10


Input: Consider Input: Each banana costs $ 5 . How much do 4 bananas cost ?


Output: 20