#include<fstream.h>
int cmmdc(unsigned long a,unsigned long b)
{
	if(a<b) {a=a+b; b=a-b; a=a-b;}
	int r=a%b;
	while(r!=0)
	{
		a=b; b=r; r=a%b;
	}
	return b;
}
int main()
{
	unsigned long a,b,cmmmc,ok=1,i=0,ok2,s;

ifstream fin("multiplu.in");
ofstream fout("multiplu.out");
fin>>a>>b;
cmmmc=a*b/cmmdc(a,b);
while(ok==1)
{
	i++;
	ok2=1;
	s=cmmmc*i;
	while(s!=0 && ok2==1)
	{
		int c=s%10;
		s=s/10;
		if(c>1) ok2=0;
	}
	if(ok2==1) ok=0;
}
fout<<i*cmmmc;
return 0;
}