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:
Annie has 6 apples . She gets 6 more from Nathan . Later , Annie buys 10 crayons at the store . How many apples does Annie have in all ?

Ex Output:
12


Ex Input:
Beka flew 873 miles to visit her aunt . Jackson flew 563 miles to visit his aunt . How many more miles did Beka fly than Jackson ?

Ex Output:
310


Ex Input:
Jacqueline has 4 boxes of erasers . Each box holds 10 erasers and there are 9 boxes in a case . How many erasers does Jacqueline have ?

Ex Output:

40