import java.util.Scanner;

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

        double period = Integer.parseInt(sc.nextLine());
        double commision = Integer.parseInt(sc.nextLine());
        double rentFee = Integer.parseInt(sc.nextLine());

        var firstHalf = Math.floor(period / 2);
        var secondHalf = period - firstHalf;
        var rent = firstHalf * rentFee + secondHalf * (rentFee - rentFee * 0.2);

        var totalSum = rent + rent * (commision / 100);
        System.out.printf("Total: %.2f", totalSum);
    }
}