input: Write a function that prompts the user to enter the value of the radius to calculate the area of a circle. The function should return the calculated area as a float.
  def calculate_circle_area():
      Pi = 3.14
      radius = float(input("Please enter the radius of the circle: "))
      area = Pi * radius ** 2
      return area
  
  assert calculate_circle_area() == 78.5, "Test Case 1 Failed"
  assert calculate_circle_area() == 28.26, "Test Case 2 Failed"
output: def calculate_circle_area():
      Pi = 3.14
      radius = float(input("Please enter the radius of the circle: "))
      area = Pi * radius ** 2
      return area