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

[EX Q]: Context: Melissa played 3 games and scored a total of 81 points scoring the same for each game. 

 Question: How many points did she score in each game?
[EX A]: 27

[EX Q]: Context: In Haley's class 4 are boys who love to play marbles. If Haley has 23 marbles and wants to keep 15 marbles for herself 

 Question: How many will each of the boys receive?
[EX A]: 2

[EX Q]: Context: Bryan took a look at his books as well. If he has a total of 42 books and each bookshelf contains 2 books 

 Question: How many bookshelves does he have?
[EX A]:
21