using System;

public class Program

{

    public static void Main()

    {

        decimal bitcoin = decimal.Parse(Console.ReadLine());

        decimal yen = decimal.Parse(Console.ReadLine());

        decimal comision = decimal.Parse(Console.ReadLine());

        decimal bitTObgn = bitcoin*1168;

        decimal yenTOusd = yen*0.15M;

        decimal usdTObgn = yenTOusd*1.76M;

        decimal sum = bitTObgn + usdTObgn; 

        decimal bgnTOeur = sum*0.5128205128205128M;

        decimal tax = bgnTOeur*(comision/100);

        double result = (double)bgnTOeur - (double)tax;

        Console.WriteLine(result);

    }

}