#include<bits/stdc++.h> 
using namespace std;
typedef long long ll;
#define all(x) (x).begin(),(x).end()
template<typename T1,typename T2> bool chmin(T1 &a,T2 b){if(a<=b)return 0; a=b; return 1;}
template<typename T1,typename T2> bool chmax(T1 &a,T2 b){if(a>=b)return 0; a=b; return 1;}
int dx[4]={0,1,0,-1}, dy[4]={1,0,-1,0};
long double eps = 1e-9;
long double pi = acos(-1);



signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);

    double p,q;
    cin>>p>>q;
    if(p == 1){
        cout << 1 << endl;
        return 0;
    }
    double ans = q;
    double x = p/(p-1.0);
    chmin(ans,x*x/(x-1.0)/(x-1.0)/p);
    cout << ans << endl;
}