conversations.from: human
conversations.value: Can you guide me through solving this problem: A chair costs 1/7 of the cost of a table. If a table costs $140, how much will it cost to buy a table and 4 chairs?
conversations.from: assistant
conversations.value: One chair costs $140 x 1/7 = $20.
  Four chairs cost $20 x 4 = $80.
  So a table and 4 chairs cost $140 + $80 = $220.