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.
One example is below.
Q: Context: Sam is 6 feet tall and Alex is 5 feet tall 

 Question: By how many feet is Sam taller than Alex? 
A: 1
Rationale:  Sam's height - Alex's height = 6-5 = 1
Q: Context: Danny collects bottle caps and wrappers. He found 22 bottle caps and 30 wrappers at the park. Now he has 17 bottle caps and 57 wrappers in his collection. 

 Question: How many wrappers did danny have at first?
A:
27