prompt: John buys 3 t-shirts that cost $20 each.  He also buys $50 in pants.  How much does he spend?
messages.content: John buys 3 t-shirts that cost $20 each.  He also buys $50 in pants.  How much does he spend?
messages.role: user
messages.content: He spends 20*3=$<<20*3=60>>60 on t-shirts
  So he spends 60+50=$<<60+50=110>>110 in total
  #### 110
messages.role: assistant