using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("start");

        area(2);

        area(2,4);

    }

    static void area(int r)

    {

        double ans;

        ans=3.14*r*r;

        Console.WriteLine("Area of circle="+ans);

    }

    static void area ( int l,int b)

    {

        int ans;

        ans = l* b;

        Console.WriteLine("Area of rectangle="+ans);

    }

}