#include<stdio.h>
FILE*fin,*fout;
inline int euclid(int a,int b)
{
    int r=1;
    while(a%b!=0)
    {
        r=a%b;
        a=b;
        b=r;
    }
    return b;
}
bool check(int n)
{
    do
    {
        if(n%10>1)
        {
            return 0;
        }
        n/=10;
    }while(n);
    return 1;
}
int main()
{
    fin=fopen("multiplu.in","r");
    fout=fopen("multiplu.out","w");
    int a,b;
    fscanf(fin,"%d%d",&a,&b);
    int d=euclid(a,b);
    int M=(a*b)/d;
    bool gasit=false;
    int ans;
    for(int i=M;!gasit;i+=M)
    {
        gasit=check(i);
        ans=i;
    }
    printf("%d",ans);
    fprintf(fout,"%d",ans);
}