#include<stdio.h>
#include<math.h>
int main(){
    int length,breath,rect_area;
    double radius,circle_area;
    scanf("%d",&length);
    scanf("%d",&breath);
    scanf("%1f",&radius);
    rect_area=length*breath;
    circle_area=PI*radius*radius;
    printf("%d\n",rect_area);
    printf("%.2f\n",circle_area);
    return 0;
}