conversations.from: human
conversations.value: Find the answer to this math problem: Julie had $500. She spent 20% of it on clothes and then 25% of the remaining money on CDs. How much money did Julie have left?
conversations.from: assistant
conversations.value: Julie spend $500 * 0.2 = $100 for clothes.
  Julie then had $500 - $100 = $400 left.
  She spend $400 * 0.25 = $100 on CDs.
  Julie had $400 - $100 = $300 left.