conversations.from: human
conversations.value: This math problem has got me stumped: Juan needs 10 half-gallons of milk to bake 40 cookies with. How many half-gallons of milk does Juan need to bake 200 dozen cookies?
  Can you show me the way?
conversations.from: assistant
conversations.value: If 10 half-gallons of milk bake 40 cookies, then one half-gallon of milk bakes 40/10 = 4 cookies.
  If one half-gallon of milk bakes 4 cookies. to bake 200 cookies, you'll need 200/4 = 50 half-gallons of milk