Eka karanna Godak money Oneda machan?you can , yes
there many ways to do ,
1. yes you can share with 4 port router or single port with usb router but the problem is is it actually 100m ? u can set your router in midle place it getting bit OK
2. you can try with "access point" with your normal adsl router and your 2nd conection (pc) have to wireless receiver
3. use normal wireless router but all routers beret for indoor use only
i tested 200m with access point it cost 1-router+acess point+wirless reciver 4500+7500+3500RS

Gewal deka godak langanam lesima widiha Wireless router ekak use karana eka, nathnam normal CAT5 LAN cable ekak adinna wei. Specs walata anuwa CAT 5 ethernet cable ekak 100meters use karanna puluwan, namuth echchara durak addoth speed eka godak drop wei. SLT broadband mang danna tharamata 8Mbit wath yanne naa. Normally 4Mbit needa ganna puluwan maximum ? Eka nisa echchara problem ekak newei. Ai 100M one ? Local network ekakatada ?