#include<bits/stdc++.h>
// #include<atcoder/all>

using namespace std;
// using namespace atcoder;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define MOD 1000000007


int main(){
  
  cout << fixed << setprecision(20);
  ll p,q;
  cin >> p >> q;
  long double res = 0;
  long double k = 1;
  rep(i,1000000){
    k /= p;
    res += (i+1)*k;
    k *= (p-1);
  }
  cout << min(res,(long double)(q)) << "\n";
  


  return 0;
}