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.

[EX Q]: Context: After a typhoon, 2 trees in Haley's backyard died. If she had grown 11 trees initially 

 Question: How many more trees survived the typhoon than those that died?
[EX A]: 7

[EX Q]: Context: There are 8 different movies and 21 different books in the ' crazy silly school ' series. If you read 7 of the books and watched 4 of the movies 

 Question: How many more movies do you still have to watch?
[EX A]: 4

[EX Q]: Context: There were 22 parents in the program and 676 people in total. 

 Question: How many pupils were present in the program?
[EX A]:
654