conversations.from: human
conversations.value: Can you break down the solution for me for this math problem: Reggie's father gave him $48. Reggie bought 5 books, each of which cost $2. How much money does Reggie have left?
conversations.from: assistant
conversations.value: The cost of the books is 5 × $2 = $10.
  Reggie has $48 − $10 = $38 left.