Detailed Instructions: 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.
Problem:Context: Paul got a box of 267 crayons for his birthday. During the school year he lost 231 crayons while he gave away 308 crayons to his friends.

Question: How many more crayons did he give to his friends than those he lost?
Solution:
77