How to one static public ip address NAT two internal server?

Hello,

I have one static public ip address (1.1.1.1) from ISP that want to NAT to two internal server, web 80 port (192.168.0.1) and
ftp 21 port (192.168.0.2), can I use one static public ip address to NAT to tow internal server ? if so, how to do that ?

Thanks !

http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/NAT#Port_mapping