how to add route to 10.0.0.0/8 via DHCP option 82

I have interface with DHCP, PPPOE server and IP address 10.100.3.2/24.
How to config DHCP server for his clients received route 10.0.0.0/8 gw 10.100.3.2 ?
Thank you!

it has nothing to do with Option 82

/ip dhcp-server option
add code=249 name=static-routes value=0x080a0a640302

thank you!
work.