prompt: Tim won a $100 raffle.  He gave away 20% to his friend.  How much did he keep?
messages.content: Tim won a $100 raffle.  He gave away 20% to his friend.  How much did he keep?
messages.role: user
messages.content: He gave away 100*.2=$<<100*.2=20>>20
  So he kept 100-20=$<<100-20=80>>80
  #### 80
messages.role: assistant