#include 
#include 
using namespace std;


int main() {
    // Declare R. P
    double r;
    double p = 3.14; 
    
    // Read R
    cout << "Enter the Radius: ";
    cin >> radius;
    
    // Solve the Radius of a circle
    // using radius formula in circle
    radius = pi * pow(radius, 2);
    
    double circle = 2 * pi * radius;
    
    // Display R and C
    cout << "Radius of Circle = " << radius << endl;
    cout << "Circle Area = " << circle << endl;
    
    return 0;
}