#include<bits/stdc++.h> using namespace std; int main(){ float a,b,c,d,e,f; a=1; b=3; c=5; d=7; e=9; f=3.14159265; cout <<a*a*f << endl; cout <<b*b*f <<endl; cout <<c*c*f <<endl; cout <<d*d*f <<endl; cout <<e*e*f <<endl; return 0; }