#include <iostream>

using namespace std;

int main() {
    int n, k, p = 1, c, nr;
    cin >> n >> k;
    nr = 0;
    while (n) {
        c = n % 10;
        if (c != k) {
            nr++;
            p *= c;
        }
        n /= 10;
    }
    if (nr == 0)
        cout << 0;
    else
        cout << p;
    return 0;
}