conversations.from: human
conversations.value: Solve the math problem: Mandy has three $20 bills while Manny has two $50 bills. If both of them decide to exchange their bills for $10 bills, how many more $10 bills than Mandy will Manny have?
conversations.from: assistant
conversations.value: Mandy has a total of $20 x 3 = $60.
  So, she will have $60/$10 = 6 $10 bills.
  Manny has a total of $50 x 2 = $100.
  So, he will have $100/$10 = 10 $10 bills.
  Hence, Manny has 10 - 6 = 4 more $10 bills than Mandy.