import java.util.Scanner;

public class Main {
	public static void main(String[] args){

		Scanner sc = new Scanner(System.in);
		float numA = sc.nextFloat();
		float numB = sc.nextFloat();
		float numC = (100-numA)/100;
		float numD = numB/((100-numA)/100);
		System.out.println(numD);
	}
}