2
You can create a css file and put in this code:
.column1, .column2, .column3 { width: 33% }
and in a html file this code:
<div class="grid">
<div class="column1">Column 1</div>
<div class="column2">Column 2</div>
<div class="column3">Column 3</div>
</div><!-- /grid -->