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