<style>
input {width:80px;}
.total div {float:left;}
.total .text {width:110px;}
.total .total {font-weight:bold;}
</style>
<div class="grupo">
<input type="text" name="a" id="a" value="0" />
<input type="text" name="s" id="s" value="0" />
<span class="total">0</span>
</div>