10287.cpp

#include <stdio.h>
#include <math.h>
int main()
{
	double a;
	while (scanf (" %lf", &a )!= EOF)
	{
		double k = sqrt(3.00);
		double r1, r2, r3, r4;
		r1 = k * a/ 2;
		r2 = a*k / (k + 2);
		r3 =  k*a / 4;
		r4 = k*a*(sqrt(84.0) - 7)/10;
		printf("%.10lf %.10lf %.10lf %.10lf\n", r1, r2, r3, r4 );
	}

	return 0;
}