#include<bits/stdc++.h>
using lint=long long;
using real=long double;
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    real a,b;std::cin>>a>>b;
    real pi=std::acos(real{0})*2;
    real t=2*pi-2*std::asin(a/b);
    std::cout<<t<<'\n'<<t*b*a*2+pi*a*a<<'\n';
}