what should i do now?

[NauticA]

today i bought creative Inspiron 4.1 for my laptop ..
but when i tried to connect there was only one slot on my laptop for speakers..
so when i put the wire into that slot i was able to get sound from only two speakers and not from the other two..
what should i do now?
is there any way out?

 

[Garbage]

You may need a separate sound card... or check for 2.1 to 4.1 sound jack.

 

[NauticA]

where should i check out?
what be the cost of usb sound card?