conversations.from: human
conversations.value: Rachel is 12 years old, and her grandfather is 7 times her age. Her mother is half grandfather's age, and her father is 5 years older than her mother. How old will Rachel's father be when she is 25 years old?
  Find the solution.
conversations.from: assistant
conversations.value: Rachel's grandfather is 12 x 7 = 84 years old.
  Her mother is 84/2 = 42 years old.
  Her father is 42 + 5 = 47 years old.
  Rachel will be 25 years old in 25 - 12 = 13 years.
  Rachel's father will be 47 + 13 = 60 years old.