import java.text.DecimalFormat;
import java.util.Scanner;

public class Salary {
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);

        System.out.print("Days of work = ");
        double daysOfWork = scanner.nextDouble();
        System.out.print("Day salary = ");
        double daySalary = scanner.nextDouble();
        System.out.print("Rate USD = ");
        double rateUSD = scanner.nextDouble();

        double monthSalary = daysOfWork * daySalary;
        double bonus = monthSalary * 2.5;
        double yearSalary = monthSalary * 12 + bonus;
        double taxes = yearSalary * 0.25;
        double grossSalary = yearSalary - taxes;
        double averageDay = grossSalary / 365;

        double usdToBGN = averageDay * rateUSD;

        DecimalFormat decimalFormat = new DecimalFormat("#.##");

        System.out.print(decimalFormat.format(usdToBGN));
    }
}