conversations.from: human
conversations.value: Nathan plays amateur baseball. He played for 3 hours for two weeks, every day. His friend Tobias played for 5 hours every day, but only for one week. How many hours did Nathan and Tobias play in total?
  Find the solution.
conversations.from: assistant
conversations.value: Two weeks are 14 days, so Nathan played for 3 * 14 = 42 hours.
  Tobias played for 7 days, so he played a total of 5 * 7 = 35 hours.
  Nathan and Tobias played together for 42 + 35 = 77 hours.