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

        int months = Integer.parseInt(scanner.nextLine());
        int percent = Integer.parseInt(scanner.nextLine());
        double rent = Double.parseDouble(scanner.nextLine());

        int halfMonths = months / 2;
        double halfSum = rent * halfMonths;

        int secondHalf = months - halfMonths;
        double secondSum = (rent - (rent * (20 / 100.0))) * secondHalf;

        double totalSum = halfSum + secondSum;
        double broker = totalSum * (percent / 100.0);
        double totalSum2 = totalSum + broker;

        System.out.printf("Total: %.2f", totalSum2);
    }
}