#include<iostream.h>
#include<stdio.h>
int main ()
{unsigned long int a,ca,b,cb,r,m,m2;
int nr,truth;
freopen("multiplu.in", "rt", stdin);
freopen("multiplu.out", "wt", stdout);
cin>>a;
cin>>b;
ca=a; cb=b;
r=a%b;
while (r!=0) {ca=cb;
	      cb=r;
	      r=ca%cb;}
m=(a*b)/cb;
for (nr=1,truth=0;truth==0;nr++)
          {m2=m*nr;
           while (m2%10<=1 && m2>0) m2=m2/10;
           if (m2==0) truth=1;}
m2=m*(nr-1);
cout<<m2;
return 0;}