Python float round error 117.285 round to 117.28 not 117.29
<p>I am using python 2.7, and the code I have is:</p>

<pre><code>a = 10.5 * 22.34 / 2.0
print "%.2f" % a
</code></pre>

<p>and the result I expect is 117.29, but it shows 117.28. How to solve the problem?</p>
