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:
There are 8 apples in a pile on the desk . Each apple comes in a package of 11 . 5 apples are added to the pile . How many apples are there in the pile ?

Ex Output:
13


Ex Input:
Adam has $ 5 to buy an airplane that costs $ 4.28 . How much change will Adam get ?

Ex Output:
0.72


Ex Input:
There are 55 oranges in a box . Deborah has 11 oranges in a bag . Susan takes 35 oranges out of the box . How many oranges are left in the box ?

Ex Output:

20