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:
A company painted some houses in Hancock County white and blue using a total of 6689 gallons of paint . If they used 660 gallons of white paint , how many gallons of blue paint did the company use ?

Ex Output:
6029


Ex Input:
Joan purchased a basketball game for $ 5.2 , and a racing game for $ 4.23 . How much did Joan spend on video games ?

Ex Output:
9.43


Ex Input:
Randy has 78 blocks . He uses 19 blocks to build a tower . How many blocks are left ?

Ex Output:

59