conversations.from: human
conversations.value: Our small city has two buses.  Each bus can have a capacity of 1/6 as much as the train, which has a capacity of 120 people.  What is the combined capacity of the two buses?
conversations.from: assistant
conversations.value: Every bus has a capacity of: 120 * 1/6 = 20 people.
  Combined, both the buses have a capacity of 20 * 2= 40 people.