conversations.from: human
conversations.value: I'm stuck on this math problem: To earn money for her new computer, Tina sells handmade postcards. In a day, she can make 30 such postcards. For each postcard sold, Tina gets $5. How much money did Tina earn if she managed to sell all the postcards she made every day for 6 days?
  Can you help?
conversations.from: assistant
conversations.value: Tina made postcards for 6 days, so she has made 6 days * 30 postcards/day = 180 postcards.
  For every postcard, Tina gets $5, so if she sold every card, she got 180 postcards * $5/postcard = $900.