conversations.from: human
conversations.value: Can you explain how to solve this math problem: If Joe spent 1/9 of his pocket money of $450 on chocolates and 2/5 on fruits, how much money does he have left?
conversations.from: assistant
conversations.value: Joe spent 1/9 * $450 = $50 on chocolate.
  Joe spent 2/5 * $450 = $180 on fruits.
  Joe has $450 - $50 - $180 = $220 left.