#include<stdio.h>
int main (){
    double pi = 3.141592;
    int l;
    int b;
    double r;
    scanf("%d \n%d \n%1f",&l,&b,&r);
    int area;
    area = l*b;
    printf("%d\n",area);
    float circle;
    circle = pi *r *r;
    printf("%.2f",circle);
    return 0;
}