Simple static route help

Hi there,

I’ve got this on an Omnitik

ether1: 192.168.1.5 (GATEWAY is 192.168.1.1)
ether3: 192.168.2.1

I want that a PC connected to ether can ping 192.168.1.1

What rule do I have to insert?

simple,

/ip route add gateway=192.168.1.1