conversations.from: human
conversations.value: Break down this math problem: A carpenter is building a house. He needs 80 woodblocks to build it. If he has 8 logs that can make five woodblocks each, how many logs does the carpenter still need?
conversations.from: assistant
conversations.value: The carpenter initially has 8 x 5 = 40 blocks of wood.
  So he still lacks 80 - 40 = 40 blocks of wood.
  Therefore he still needs 40 / 5 = 8 logs of wood.