conversations.from: human
conversations.value: Paul needs 63 cupcakes for a birthday party happening on Saturday. He already has 8 chocolate cupcakes and 40 toffee cupcakes. How many more cupcakes should Paul buy?
conversations.from: assistant
conversations.value: The total number of chocolate and toffee cupcakes is 8 + 40 = 48.
  Paul should buy 63 − 48 = 15 more cupcakes.