// 除算が遅い計算機のために除算を使わないで逆数を求める方法
#include "stdio.h"
#include "math.h"
double rev(double X){
	double absX=abs(X), R=1.0, RR;
	while(R * absX > 1) R *= 0.5;
	do{	RR=R; R *= (2 - absX * R);} while(R != RR);
	if(X<0) R = - R;
	return R;
}
int main(){
	double X;
	while(scanf("%lf",&X)!=EOF){
		double Y=rev(X);
		printf(" 1/ %lf = %lf  (X * Y - 1 =  %le)\n",X, Y, X*Y-1);
	}

}