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.

Input: Consider Input: Context: In a school there are 868 girls and the rest are boys. If there are 281 more girls than boys

Question: How many pupils are there in that school?

Output: 1455

Input: Consider Input: Context: Winter is almost here and most animals are migrating to warmer countries. There are 38 bird families living near the mountain. If 47 bird families flew away to africa and 94 bird families flew away to asia

Question: How many more bird families flew away to asia than those that flew away to africa?

Output: 47

Input: Consider Input: Context: Zachary did 15 push-ups in gym class today. David did 39 more push-ups than Zachary. John did 9 push-ups less than David.

Question: How many more push-ups did Zachary do than John?
Output: 30