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

public class No56 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		BigDecimal D = new BigDecimal(sc.next());
		BigDecimal P = new BigDecimal(sc.next());

		BigDecimal tmp = new BigDecimal(100);
		P =P.divide(tmp);
		tmp=new BigDecimal(1);
		P=P.add(tmp);

		BigDecimal re = D.multiply(P);
		re = re.stripTrailingZeros();
		System.out.println(re);

	}

}