prompt: Tom buys 20 shares of a stock that costs $3 each.  He sells 10 of those shares for $4 each.  The rest of the shares end up doubling in value.  How much profit does he make?
messages.content: Tom buys 20 shares of a stock that costs $3 each.  He sells 10 of those shares for $4 each.  The rest of the shares end up doubling in value.  How much profit does he make?
messages.role: user
messages.content: He spends 3*20=$<<3*20=60>>60 on the shares.
  He sells 10 for 10*4=$<<10*4=40>>40.
  He sells the other 20-10=<<20-10=10>>10 for a higher valuation.
  Their price was 3*2=$<<3*2=6>>6.
  So he got 10*6=$<<10*6=60>>60 from those.
  So in total, he got 60+40=$<<60+40=100>>100.
  So his profit was 100-60=$<<100-60=40>>40.
  #### 40
messages.role: assistant