conversations.from: human
conversations.value: I'm completely lost with this math problem: Carlos and Benji are at the beach. Carlos rents a canoe for $30 an hour and Benji rents a banana boat raft for $18 an hour. If Carlos uses the boat for 3 hours and Benji uses the raft for 5 hours, how much will they pay for their rentals, altogether?
  Can you give me a hand?
conversations.from: assistant
conversations.value: Carlos would have to pay $30 x 3 = $90
  Benji would have to pay $18 x 5 = $90
  All together, Carlos and Benji will have to pay $90 + $90 = $180