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: After eating a hearty meal they went to see the Buckingham palace. There, Rachel learned that 705 visitors came to the Buckingham palace that day. If there were 191 visitors the previous day and 457 visitors the day before that 

 Question: How many more visitors visited the Buckingham palace on that day than on the previous 245 days?
57

Context: 52 campers went rowing in the morning. 61 campers went rowing in the afternoon. 

 Question: How many more campers went rowing in the afternoon than in the morning?
9

Context: Some campers went rowing in the morning while 7 campers went rowing in the afternoon. If a total of 60 campers went rowing that day 

 Question: How many campers went rowing in the morning?

53