import java.util.Scanner;

public class Main{

	static Scanner s=new Scanner(System.in);

	public static void main(String __[]){
		input();
		solve();
	}

	private static void input(){
	}

	private static void solve(){
		int a=s.nextInt(),b=s.nextInt();
		System.out.println((int)(a*b/100.0+a));
	}
}