#include <bits/stdc++.h>
using namespace std;
int a, n, res;
int main()
{
    cin >> a >> n;
    int c = a;
    for (int i = 1; i <= n; i ++)
    {
        res += a;
        a = a * 10 + c;
    }
    cout << res;
    return 0;
}