#include<iostream>
using namespace std;

int main() {
    double v;
    int t;
    cin >> v >> t;
    int a = t / 10000;
    int b = (t % 10000) / 1000;
    int c = (t % 1000) / 100;
    int d = (t % 100) / 10;
    int e = t % 10;
    double res = 0;
    res += e * v;
    res += v * 10 * d;
    res += v * 100 * c;
    res += v * 1000 * b;
    res += v * 10000 * a;
    cout << res / 1 << endl;
}