prompt: Jack orders 3 sandwiches that cost $5 each.  He pays with a $20 bill.  How much does he get in change?
messages.content: Jack orders 3 sandwiches that cost $5 each.  He pays with a $20 bill.  How much does he get in change?
messages.role: user
messages.content: The cost was 3*5=$<<3*5=15>>15.
  So he got 20-15=$<<20-15=5>>5 in change.
  #### 5
messages.role: assistant