conversations.from: human
conversations.value: A classroom has a whiteboard which is shared between the 4 teachers who take turns using the classroom. Each teacher has 2 lessons per day and uses the whiteboard in each lesson. If the whiteboard is cleaned 3 times per lesson, how many times is the whiteboard cleaned in a day?
  Find the solution.
conversations.from: assistant
conversations.value: In one day, there are a total of 4 teachers * 2 lessons each = 8 lessons.
  The whiteboard is therefore cleaned 8 lessons * 3 cleans per lesson = 24 times.