#include <stdio.h> int main() { int w,d,r,z; scanf("%d %d %d %d",&w,&d,&r,&z); printf("%d\n",w*d); if ((float)(3.14*r*r) == (int)(3.14*r*r) ) { printf("%d\n",(int)(3.14*r*r)); } else if((int)(((float)(3.14*r*r)-(int)(3.14*r*r))*100) % 10 == 0){ pri...