#include <iostream>
#include <iomanip>
#include <algorithm>

using namespace std;

int main() {
	setlocale(LC_ALL, "rus");
	int k;
	double res = 1;
	double x;
	cin >> x >> k;
	double elem = x;
	for (int n = 2; n <= k; ++n) {
		res *= (1 + elem);
		elem *= x / n;
	}
	cout << res * elem << endl;
	return 0;
}