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: Bobby had 32 pieces of candy. He ate some pieces of candy. If he has 20 pieces of candy left

Question: How many pieces of candy did Bobby eat?
12

Context: There were 3 dollars in Olivia's wallet. She collected 49 more dollars from an atm. After she visited a supermarket there were 49 dollars left.

Question: How much more money did she collect at the atm than she spent at the supermarket?
46

Context: Dave had 19 apps and 18 files on his phone. After deleting some apps and files he had 6 apps and 15 files left.

Question: How many more files than apps does he have left on the phone?
9