#include <stdio.h>
#include<math.h>
#ifndef M_PI
#define _PI 3.14159265358979323846
#endif
int main() {
    int length, breadth, rect_area;
    double radius, circle_area;
    scanf("%d", &length);
    scanf("%d", &breadth);
    scanf("%lf", &radius);
    rect_area = length * breadth;
    circle_area = M_PI * radius * radius;
    printf("%d\n", rect_area);
    printf("%.2f\n",)circle_area);
    
    return 0;