prompt: Mark buys a Magic card for $100, which then triples in value.  How much profit would he make selling it?
messages.content: Mark buys a Magic card for $100, which then triples in value.  How much profit would he make selling it?
messages.role: user
messages.content: The value went up to 100*3=$<<100*3=300>>300
  So he gained 300-100=$<<300-100=200>>200
  #### 200
messages.role: assistant