#include<fstream.h>
int cmmdc(int a, int b)
{ if(a==b)return a;
else{
  if(a>b)  cmmdc(a-b,b);
	       else cmmdc(b-a,a);

  }  }

int main(){
ifstream f("multiplu.in");
ofstream g("multiplu.out");
long a,b,c,ok,i,d,h;
f>>a>>b;
d=cmmdc(a,b);
h=d;
ok=0;
 i=2;
while(ok==0){  c=d;
ok=1;
while(c!=0){if(c%10!=0&&c%10!=1){ok=0;c=0;}
c=c/10;}
if((ok==1)&&(d%a!=0||d%b!=0))ok=0;
d=h*i;
i++;
}
d=d-h;
g<<d;}