// editor2
#include<stdio.h>
#include<math.h>
#define pi 3.14


int main() {
    int length,breadth;
    double radius,circle_area;
    int rectangle_area;
    
    scanf("%d", &length);
    scanf("%d", &breadth);
    scanf("%lf", &radius);
    
    rectangle_area=length*breadth;
    circle_area = M_PI* radius* radius;
    
    printf("%d\n", rectangle_area);
    printf("%.2f\n", circle_area);
    
    return 0;
}