// editor3
#include<stdio.h>
int area_rec(int l, int b){
    return l*b;
}
float area_cir(int r){
    return 2*(22/7)*r;
}
int main(){
    int length, breadth;
    float radius;
    scanf("%d\n", &length);
    scanf("%d\n", &breadth);
    scanf("%f\n", &radius);
    int rec = area_rec(length, breadth);
    int cir = area-cir(radius);
    printf("%d\n", rec);
    printf("%.2f\n", cir);
}