conversations.from: human
conversations.value: Tom bought a CD for $4, and a headphone set. In total, he paid $48. How many more CDs would Tom have been able to buy if he had decided not to buy the headphone set?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: The headphone set cost was 48 - 4 = $44.
  That means, for that money Tom would be able to buy 44 / 4 = 11 more CDs.