#include<stdio.h>
#include<math.h>
int main()
{
    int length,breadth,rect;
    float radius,cir;
    scanf("%d",&length);
    scanf("%d",&breadth);
    scanf("%f",&radius);
    rect=(length*breadth);
    cir=(import(math.pi)*(radius*radius));
    printf("%d",rect);
    printf("\n%.2f",cir);
    return 0;
}