conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: Nicky is trading baseball cards with Jill. If Nicky trades two cards worth $8 each for 1 card worth $21, how many dollars of profit does he make?
conversations.from: assistant
conversations.value: First find the total cost of the two $8 cards: $8/card * 2 cards = $16
  Then subtract the cost of the cards Nicky gave away from the cost of the card he received to find his profit: $21 - $16 = $5