conversations.from: human
conversations.value: I'm completely lost with this math problem: Marlon has a gift card for $200. He spent half of it on Monday and one-fourth of the remainder on Tuesday. How much was left on his gift card?
  Can you give me a hand?
conversations.from: assistant
conversations.value: Since Marlon spent half of the gift card, then half of it which is $200/2 = $100 remained on Monday.
  Then on Tuesday, he spent $100/4 = $25.
  Therefore, he has $100 - $25 = $75 left in his gift card.