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

[EX Q]: Context: In a school there are 697 girls and the rest are boys. If there are 228 more girls than boys 

 Question: How many boys are there in that school?
[EX A]: 469

[EX Q]: Context: Paco had 12 cookies. He ate 16 cookies and gave 21 of them to his friend. 

 Question: How many more cookies did he give to his friend than those he ate?
[EX A]: 5

[EX Q]: Context: Paul had 108 books and 55 pens. After selling some books and pens in a garage sale he had 66 books and 59 pens left. 

 Question: How many books did he sell in the garage sale?
[EX A]:
42