08.Triangle_Area

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _08.Triangle_Area
{
    class Triangle_Area
    {
        static void Main(string[] args)
        {


            double a = double.Parse(Console.ReadLine());
            double h = double.Parse(Console.ReadLine());
            double area = Math.Round((a * h) / 2,2);
            Console.WriteLine("Triangle area = {0}",area);

        }
    }
}