conversations.from: human
conversations.value: Vanessa wants to buy a dress she saw at the mall, which costs $80, and she already has $20 in savings. Her parents give her $30 every week, but she also spends $10 each weekend at the arcades. How many weeks will she have to wait until she can gather enough money to buy the dress?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: Vanessa needs $80 – $20 = $60 to buy the dress.
  She manages to gather $30 - $10 = $20 each week
  The number of weeks she has to wait is 60 ÷ 20 = 3 weeks.