conversations.from: human
conversations.value: Solve the following math problem: 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?
conversations.from: assistant
conversations.value: He spends 3*20=$60 on the shares.
  He sells 10 for 10*4=$40.
  He sells the other 20-10=10 for a higher valuation.
  Their price was 3*2=$6.
  So he got 10*6=$60 from those.
  So in total, he got 60+40=$100.
  So his profit was 100-60=$40.