input: def calculate_square_root(n: float) -> float:
      """Calculates the square root of a given positive number.
      >>> calculate_square_root(100)
      10.0
      >>> calculate_square_root(4)
      2.0
      """
  
output:     if n < 0:
          raise ValueError("Input must be a non-negative number")
      return n ** 0.5