You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
Roger was putting his spare change into piles . He had 3 piles of quarters and 3 piles of dimes . If each pile had 7 coins in it , how many coins did he have total ?

Ex Output:
42


Ex Input:
Lana was unboxing some of her old winter clothes . She found 3 boxes of clothing and inside each box there were 3 scarves and 4 mittens . How many pieces of winter clothing did Lana have total ?

Ex Output:
21


Ex Input:
Tom has 9 yellow balloons Sara has 8 yellow balloons . How many yellow balloons do they have in total ?

Ex Output:

17