How do I change Image HTML template in img_assist settings to make the text wrap around images

Here's what I know from wordpress:

You put <div style="display:block;float:right;margin: 0px 10px 0px 0px;"></div> around the adsense code to make the text wrap around the ad.

How do you incorporate this in the default Image HTML Template setting --

<div class="%image-class">
  <a href="%node-link"><img src="%src" width="%width" height="%height" alt="%alt" /></a>
  <div class="caption">%caption</div>
</div>

-- to make the text wrap around the image? Or what's the exact HTML code that I should use. As you can see, am not really CSS adept.

Thanks in advance! :)