conversations.from: human
conversations.value: Mrs. Brown paid her utility bills with 3 $50 bills and 2 $10 bills. How much are her utility bills?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: Mrs. Brown's $50 bills amount to $50 x 3 = $150.
  Her $10 bills amount to $10 x 2 = $20.
  So Mrs. Brown's utility bills cost $150 + $20 = $170.