conversations.from: human
conversations.value: One pair of pants requires 8.5 feet of fabric. Nguyen needs to make 7 pairs of pants for the wedding. He has 3.5 yards of fabric. How many feet of fabric does Nguyen still need for the pants?
  What is the solution?
conversations.from: assistant
conversations.value: Pants = 8.5 * 7 = 59.5 feet
  3.5 yards = 10.5 feet
  59.5 - 10.5 = 49
  Nguyen still needs 49 feet of fabric.