//
//	a method linearEqu that receives two a and b of ax+b=0,
//		outputs its solution/root

import java.util.Scanner;
import java.text.DecimalFormat;
class SolveLinerEqu
{
	public static void main(String[] args)
	{
		DecimalFormat f1 = new DecimalFormat("0.0");
		Scanner input = new Scanner(System.in);
		double m = input.nextDouble();
		double n = input.nextDouble();

		linearEqu(m, n);

		System.out.println("\n\n\n");
	}

	//----------------------------
	private static void linearEqu(double a, double b)
	{
		double x = -b/a;
		System.out.println("X = " + x);
	}
}