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