using System;

public class Program

{

    public static void Main()

    {

        double BASE, ALTURA, RESUL;

            string linea;

            Console.Write("DIGITE LA BASE :"); linea = Console.ReadLine();

            BASE = double.Parse(linea);

            Console.Write("DIGITE LA ALTURA:"); linea = Console.ReadLine();

            ALTURA = double.Parse(linea);

            RESUL = (BASE * ALTURA) /2;

        Console.WriteLine("AREA TRIANGULO :" + String.Format("{0:####.00}", RESUL));

        Console.WriteLine("AREA TRIANGULO :" + String.Format("{0:c}", RESUL));

        Console.WriteLine("AREA TRIANGULO :" + String.Format("{0:f}", RESUL));

        Console.WriteLine("AREA TRIANGULO :" + String.Format("{0:g}", RESUL));

        Console.WriteLine();

        Console.WriteLine("HOY ES: " + String.Format("Hoy es {0:F}", DateTime.Now));

        Console.WriteLine("HOY ES: " + String.Format("Hoy es{0:dddd}{0:dd/MM/yyy}",DateTime.Now));

        Console.Write("Pulse una tecla:"); Console.ReadLine();

       }

    }

}