conversations.from: human
conversations.value: Break down this math problem: Felix is chopping down trees in his backyard. For every 13 trees he chops down he needs to get his axe resharpened. It cost him $5 to sharpen his axe. If he spends $35 on axe sharpening, at least how many trees has he chopped down?
conversations.from: assistant
conversations.value: He has sharpened in 7 times because 35 / 5 = 7
  He has chopped down 91 trees because 7 x 13 = 91