conversations.from: human
conversations.value: Can you explain how to solve this math problem: A store sold a certain brand of jeans for $40. They only have few pairs of jeans left so they decided to give 10% discount on every two pairs of jeans bought by a customer at any one time. How much will a customer pay for 3 pairs of jeans?
conversations.from: assistant
conversations.value: Two pairs of jeans cost $40 x 2 = $80.
  A discount of $80 x 10/100 = $8 will be given for this.
  Hence, the cost of two pairs of jeans will now be $80 - $8 = $72.
  Therefore, the customer will pay $72 + $40 = $112 for the three pairs of jeans.