{ http://infoarena.ro/problema/next }
var f,g:text;
     n,m,d:int64;
BEGIN
     assign(f,'next.in'); reset(f);
     assign(g,'next.out'); rewrite(g);
     readln(f,n);
     readln(f,d);
     if n mod d = 0 then write(g,n)
                    else begin
                         m:=(n div d +1)*d;
                         write(g,m);
                         end;
     close(f); close(g);
END.