import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Scanner;

public class Main {
    static int toIntMultiplication(int a, double b) {
        BigDecimal bda = BigDecimal.valueOf(a);
        BigDecimal bdb = BigDecimal.valueOf(b);

        BigDecimal value = bda.multiply(bdb).setScale(1, RoundingMode.DOWN);
        return value.intValue();
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int d = sc.nextInt();
        double p = sc.nextDouble() / 100 + 1;

        System.out.println(toIntMultiplication(d, p));
    }

}