import java .util.*;
public class hii{
}
    public static void main(String[]args){
        int length=sc.nextInt();
        int breath=sc.nextInt();
        double radius=sc.nextDouble();
        int rectArea=length * breadth;
        double circleArea=math.Pi*radius*radius;
        System.out.println(rectarea);
        System.out.println("%.2f",circleArea)
    }
    
}