var f,g:text;
    n,d:longint;
    ok:boolean;
begin
assign(f,'next.in');reset(f);
assign(g,'next.out');rewrite(g);
readln(f,n);
readln(f,d);
repeat
ok:=false;
if n mod d=0 then ok:=true
             else inc(n);
until ok;
if ok then writeln(g,n);
close(f);
close(g);
end.