зеленчукова борса

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

namespace borsa
{
    class Program
    {
        static void Main(string[] args)
        {
            double a=double.Parse(Console.ReadLine());
            double b=double.Parse(Console.ReadLine());
            double c=double.Parse(Console.ReadLine());
            double d=double.Parse(Console.ReadLine());
            double f = a * c;
            double g = b * d;
            double eur = 1.94;
            Console.WriteLine("обща сума={0}", Math.Abs((f + g)/eur));
        }
    }
}