using System;

public class Program

{

    public static void Main()

     {nt squarePerimeter = 17; 

​

            double squareSide = squarePerimeter/4.0; 

​

            double squareArea = squareSide * squareSide; 

​

            Console.WriteLine(squareSide); //4.25 

​

            Console.WriteLine(squareArea); //18.0625 

        Console.WriteLine();

    }

}