#include<stdio.h>
int main()
{long long unsigned n,d,i,nr;
FILE *f=fopen("next.in","r");
FILE*g=fopen("next.out","w");
fscanf(f,"%llu\n%llu",&n,&d);
if (n>d) i=n;
else i=d;
nr=1;
while (nr)
	{if (i%d==0) {fprintf(g,"%llu",i); break; }
	i=i+1;}
fclose(f);
fclose(g);
return 0;}