#include <iostream>
#include <vector>
#include <utility>
#include <algorithm>
#include <string>
#include <stack>
using ll = long long;
#define MOD 1000000007
using namespace std;

int main(){
    int M, N;
    cin >> M >> N;
    double a = 0;
    for(int i = 0; i < N; i++)
    {
        a += 1.0/3;
    }
    printf("%.12f\n", M+a);
    return 0;
}