conversations.from: human
conversations.value: Frank and Bill have $42 and they bought 3 large pizzas with the money. Each pizza cost $11 and Frank paid for all three pizzas. Frank gave the rest of his money to Bill. If Bill had $30 already, how much money does Bill have now?
  Solve this problem.
conversations.from: assistant
conversations.value: Frank spent 11*3 = 33 dollars on pizza.
  Frank gives 42-33 = 9 dollars to Bill.
  Bill now has 30+9 = 39 dollars.