#include <iostream>
#include <iomanip>

using namespace std;

const double PI = 3.1415926;

void main(void)
{
	double f, g, r;

	cout << " enter an r : ";
	cin >> r;

	setprecision(2);
	f = PI;
	g = 2 * PI * r;
	cout << "f\t" << f << endl
		 << "g\t" << g << endl
		 << "r\t" << r << endl;
	r = f * 10000000;
//	cout << "new r\t" << fixed << setw(10) << r << endl;
	cout << "new r\t" << setw(10) << r << endl;
}