conversations.from: human
conversations.value: John ends up damaging his hearing aids.  He needs to replace both of them.  They cost $2500 each.  Insurance covers 80% of the cost.  How much does he personally have to pay?
  Can you solve this problem?
conversations.from: assistant
conversations.value: The cost of the hearing aids is $2500 * 2 = $5000
  So insurance covers $5000 * .8 = $4000
  That means it cost him $5000 - $4000 = $1000