Can we setup 3rd or 4th dns in ip dns? How i get it?

I wanna use it in 2 gateway from 2 isp, each isp have 2 dns server

TIA

Via Winbox...

IP -> DHCP server window

Networks tab

Open up your network and click the arrow pointing down for DNS servers.

I don't believe that multiple gateways is an option on a normal DHCP server - only Cisco stuff (to my knowledge).
Note the lack of additional space for a second gateway: http://www.networksorcery.com/enp/proto ... ptions.htm

You can only specify 2 DNS servers. Pick one from each ISP.