using System;

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("========================");

        Console.WriteLine("      R A D Y T A       ");

        Console.WriteLine("========================");

        float rumus;

        float Alas;

        float Tinggi;

        float luas;

        rumus = 0.5f;

        Console.WriteLine("masukkan Alas :");

        Alas = float.Parse(Console.ReadLine());

        Console.WriteLine("masukkan tinggi :");

        Tinggi = float.Parse(Console.ReadLine());

        luas = rumus*Alas*Tinggi;

        Console.WriteLine("Luas segitiga = ½*" + Alas + "*" + Tinggi + "*" + luas);

    }

}