#include<stdio.h>
int main(){
    int length,breath;
    double radius;
    scanf("%d",&length);
    scanf("%d",&breath);
    scanf("%f",&radius);
    int arearec= length*breath;
    double areacircle =3.14*radius*radius;
    printf("%d\n",arearec);
    printf("%.2f",areacircle);
    
}