conversations.from: human
conversations.value: The perimeter of a square-shaped piece of paper is 20 cm shorter than the height of a computer screen. How many cm is the height of the screen if the side of the square paper is 20 cm?
  Find the solution.
conversations.from: assistant
conversations.value: The perimeter of a square is found by 4*side, which means the square paper has a perimeter of 4*20 = 80
  Since the perimeter of the square is 20 cm shorter than the height of the computer screen, the height of the computer screen is 20+80 = 100cm.