Of course you can!
Have you seen
http://csszengarden.com/?
http://cssvault.com/
http://www.cssbeauty.com/
You don't need the width, I just used it..
Float does what it sounds like it does, it floats something..
Perhaps you were after 3 columns?
<div style="float: left;">Left</div>
<div style="float: right;">Right</div>
<div style="text-align: center;">Center</div>