#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

const double PI = acos(-1.0);

int main()
{

	double radius(4.6789), area;

	area = PI * radius * radius;

	cout << "Area is " << area << endl;

	cout << setprecision(4) << " The radius is " << radius <<endl;

	cout << setprecision(4) << "The radius is " << setw (10) << radius << endl;

	cout << setprecision(3) << " The radius is " << radius <<endl;

	cout << setprecision(3) << "The radius is " << setw (10) << radius << endl;
	

	cout << "the radius is " << setw(10) << radius << endl;

    double costOfCircle = 32478.0;

	double costPerSqCm = costOfCircle / 90.;

cout.setf (ios::showpoint);
    cout << setprecision (6) <<"cost per square cm of circle = " << costPerSqCm << endl;

	return 0;
}