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 Q]: Sarah has 26 bottle caps . She buys 3 more . How many bottle caps does Sarah have in all ?
[EX A]: 29

[EX Q]: There are 2 apples in a pile on the desk . Each apple comes in a package of 7 . 4 apples are added to the pile . How many apples are there in the pile ?
[EX A]: 6

[EX Q]: Elisa has 37 dollars . How many more dollars does she have to earn to have 53 dollars ?
[EX A]:
16