using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Vyvedete cena vegetables);

        double cenaVegetables=double.Parse(Console.ReadLine());

    }   double cenaFruits=double.Parse(Console.ReadLine());

}       int kgVegetables = int.Parse(Console.ReadLine());

        int kgFruits = int.Parse(Console.ReadLine());

        double AllVegetables = cenaVegetables * kgVegetables;

        double AllFruits = cenaFruts * kgFruits;

        Console.WriteLine((Allvegetables=AllFruits)/1.9557);