prompt: John buys a box of 40 light bulbs.  He uses 16 of them and then gives half of what is left to a friend.  How many does he have left?
messages.content: John buys a box of 40 light bulbs.  He uses 16 of them and then gives half of what is left to a friend.  How many does he have left?
messages.role: user
messages.content: He had 40-16=<<40-16=24>>24 left after using some
  Then after giving some away he is left with 24/2=<<24/2=12>>12
  #### 12
messages.role: assistant