conversations.from: human
conversations.value: Solve the following math problem: Sara makes cakes during the five weekdays to sell on weekends. She makes 4 cakes a day and sells her cakes for $8. In 4 weeks she managed to sell all the cakes. How much money did she collect during that time?
conversations.from: assistant
conversations.value: During the week she makes 5 days/week * 4 cakes/day = 20 cakes.
  After selling them over the weekend she earns 20 cakes * $8/cake = $160.
  In 4 weeks she raised $160/week * 4 weeks = $640.