conversations.from: human
conversations.value: Solve the math problem: Mr. Langsley commutes to work every day by bus. The bus picks him up at 6:00 a.m. and takes forty minutes to arrive at the first station. If Mr. Langsley arrives at work at 9:00 a.m., what's the total time taken in minutes from the first station to Mr. Langsley's workplace?
conversations.from: assistant
conversations.value: The total time taken for the whole journey is 9:00-6:00 = 3 hours.
  The total time taken in minutes is 3*60 = 180 minutes.
  If it takes 40 minutes to reach the first station, then the rest of the journey takes 180 - 40 = 140 minutes.