conversations.from: human
conversations.value: Can you walk me through the solution of: Mary earns $20 washing cars and $40 walking dogs each month. If she puts half of that money away each month how long would it take her to save $150?
conversations.from: assistant
conversations.value: Each month she makes 20+40=$60
  Every month she saves 60/2=$30
  To save $150 it will take her 150/30=5 months