#include<iostream> using namespace std; int main(){ long long x=1,c=3,v=5,b=7,n=9; cin>>x>>c>>v>>b>>n; cout <<x*x*3.1415926<<c*c*3.1415926<<v*v*3.1415926<<b*b*3.1415926<<n*n*3.1415926; return 0; }