conversations.from: human
conversations.value: Explain how to solve this math problem: John plans to sell all his toys and use the money to buy video games. He has 13 lego sets and he sells them for $15 each. He ends up buying 8 video games for $20 each and has $5 left. How many lego sets does he still have?
conversations.from: assistant
conversations.value: He spent $160 on video games because 8 x 20 = 160
  He earned $165 from his sale because 160 + 5 = 165
  He sold 11 lego sets because 11 x 15 = 165
  He has 2 sets left because 13 - 11 = 2