conversations.from: human
conversations.value: Stan hires a magician for $60 an hour.  He works 3 hours every day for 2 weeks.  How much money does he pay the magician?
conversations.from: assistant
conversations.value: The magician works for 2*7=14 days
  So the magician works 14*3=42 hours
  So that means he pays 42*60=$2520