var n,m,c,d:int64;
f,g:text;
begin
assign(f,'next.in');reset(f);
assign(g,'next.out');rewrite(g);
readln(f,n,d);
close(f);
c:=n div d;
if n=d then m:=d
       else m:=d*(c+1);
write(g,m);
close(g);
end.