#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
typedef long long ll;
const ll inf = 4611686018427387903LL;
const int MOD=998244353;
int main()
{
  double p,q;
  cin >> p >> q;
  if(p==1){cout << 1 << endl;return 0;}
  cout << min((p-1)/(1-(1/p)),q) << endl;
  return 0;
}