conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: John goes to the market with €100. He buys a roast for €17 and vegetables for €11. How much money does he have left?
conversations.from: assistant
conversations.value: He spent 17 + 11 = €28.
  So, he still has 100 – 28 = €72 remaining.