conversations.from: human
conversations.value: I'm completely lost with this math problem: Ali has $480. He spent half of it on food, and then he spent a third of what was left on a pair of glasses. How much money did he have left?
  Can you give me a hand?
conversations.from: assistant
conversations.value: Ali spent 480/2=$240 on food.
  After buying the food, Ali had 480-240=$240 left.
  He spent 240/3=80 dollars on a pair of glasses.
  He had 240-80=$160 left.