#include<iostream> using namespace std; int main(){ int a=1; int b=3; int c=5; int d=7; int e=9; cout <<a*a*3.1415926<<endl; cout <<b*b*3.1415926<<endl; cout <<c*c*3.1415926<<endl; cout <<d*d*3.1415926<<endl; cout <<e*e*3.1415926<<endl; return 0; }