conversations.from: human
conversations.value: Each person in a certain household consumes 0.2 kg of rice every meal. Supposing 5 members of the household eat rice every lunch and dinner, how many weeks will a 42 kg bag of rice last?
  Can you solve this problem?
conversations.from: assistant
conversations.value: Each person eats 0.2 kg/meal x 2 meals/day = 0.4 kg of rice per day.
  So, the 5 members consume 0.4 kg/day/person x 5 people = 2 kg of rice per day.
  In a week, the household consumes 2 kg/day x 7 days/week = 14kg of rice.
  Thus, 42 kg of rice will last 42 kg / 14 kg/week = 3 weeks.