sharing reliance broadband on 4 lappy's

[NauticA]

got a new broadband connection from reliance today.. but i m confused about sharing it on 4 laptops all equipped with wi-fi's..
they hav a very different sort of fitting in which you dont need a modem to connect to the internet a direct cable comes and we can put it into the ethernet slot.
i want to know if there is any way i can share this net connection...

 

[iinfi]

use a wireless router.
either buy one or i think reliance gives wireless router on rent for arnd Rs.20 per month. i m not too sure abt the rent amt