import java.util.Scanner;

public class No56syouhizei {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int D = sc.nextInt(); // 値段
		int P = sc.nextInt(); // 消費税(%)
		int A = (100 * D + D * P);
		System.out.println(A / 100);
	}
}