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.

Context: 53 campers went rowing in the morning 48 campers went rowing in the afternoon and 49 campers went rowing in the evening.

Question: How many more campers went rowing in the morning than in the evening?
4

Context: Mary is baking a cake. The recipe calls for 9 cups of sugar 7 cups of flour and 4 cups of salt. She already put in 2 cups of flour.

Question: How many more cups of flour than cups of salt does she need to add now?
1

Context: 6 birds and 3 storks were sitting on the fence. 2 more storks came to join them.

Question: How many more birds than storks are sitting on the fence?
1