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.

Example Input: Context: A school has 485 pupils. There are 232 girls and the rest are boys.

Question: How many boys are there in that school?
Example Output: 253

Example Input: Context: Jack received 6 emails and 8 letters in the morning. He then received 2 emails and 7 letters in the afternoon.

Question: How many more letters did Jack receive in the morning than in the afternoon?
Example Output: 1

Example Input: Context: In a school there are 362 boys and 257 girls. 403 more girls joined the school.

Question: How many more girls than boys does the school have?
Example Output:
298