conversations.from: human
conversations.value: I would love to understand how to solve this problem: John visits his parents twice a month.  It takes him 2 hours to drive there at a speed of 70 mph.  Considering the round trip, how many miles a month does he drive when visiting his parents?
  Can you explain?
conversations.from: assistant
conversations.value: His parents live 70*2=140 miles away
  So he drives 140*2=280 miles a round trip
  280*2 = 560 miles a month