prompt: John buys dinner plates and silverware.  The silverware cost $20.  The dinner plates cost 50% as much as the silverware.  How much did he pay for everything?
messages.content: John buys dinner plates and silverware.  The silverware cost $20.  The dinner plates cost 50% as much as the silverware.  How much did he pay for everything?
messages.role: user
messages.content: The dinner plates cost 20*.5=$<<20*.5=10>>10
  So he paid 10+20=$<<10+20=30>>30
  #### 30
messages.role: assistant