#3078 prod_k

#include <iostream>
using namespace std;
int main()
{
    int n, P=1,k,ex=0,c;
    cin>>n>>k;
    while(n>0)
    {
        c=n%10;
        n=n/10;
        if(c!=k)
        {
            ex=1;
            P=P*c;
        }
    }
    if(ex==0)cout<<0;
    else cout<<P;
    return 0;
}