#include<bits/stdc++.h>
using namespace std;
ifstream fin("multiplu.in");
ofstream fout("multiplu.out");
int verif(int n)
{
    if(n % 10 == 0) return 0;
    while(n != 0)
    {
        if(n % 10 > 1) return 0;
        n /= 10;
    }
    return 1;
}
int main()
{
    int a,b,cmmdc,c,i;
    fin >> a >> b;
    cmmdc = __gcd(a,b);
    c = (a*b)/cmmdc;
    for(i = c; ;i += c)
        if(verif(i) == 1)
        {
            fout << i;
            return 0;
        }
    return 0;
}