VegetableMarket

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

namespace vegetableMarket
{
    class Program
    {
        static void Main(string[] args)
        {
            var vegetablePrice = double.Parse(Console.ReadLine());
            var fruitPrice = double.Parse(Console.ReadLine());
            var vegetableQuantity = int.Parse(Console.ReadLine());
            var fruitQuantity = int.Parse(Console.ReadLine());

            var calculate = (vegetablePrice * vegetableQuantity + fruitPrice * fruitQuantity)/1.94;
            Console.WriteLine(calculate);
        }
    }
}