sharing reliance broadband on 4 lappy's

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...