conversations.from: human
conversations.value: John plants a plot of 3 trees by 4 trees.  Each tree gives 5 apples.  He sells each apple for $.5.  How much money does he make, in dollars?
conversations.from: assistant
conversations.value: He has 3*4=12 trees
  So he has 12*5=60 apples
  So he sells the apples for 60*.5=$30