using System;

public class Program

{

    public static void Main()

    {

        string x = "5";

        string y = "7";

        string z = "0.50";

        int x2,y2;

        double z2, total;

          x2 = int.Parse(x);

          y2 = int.Parse(y);    

          z2 = double.Parse(z);

        total = z2 * x2 * y2 ;

        Console.WriteLine("Result = {0} => {1}",x + y,x2 + y2);

        Console.WriteLine("พื้นที่สามเหลี่ยม คือ {0}",total);

    }

}