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