#include<stdio.h>

int main(){
    int l;
    int b;
    double r;
    int rect;
    double circle;
    scanf("%d",&l);
    scanf("%d", &b);
    scanf("%f",&r);
    rect = l * b;
    circle = 3.14159 * r * r;
    printf("%d\n", rect);
    printf("%.2lf",circle);
    return 0;
}