Unable to see Python's approximations in mathematical calculations
<p><strong>Problem:</strong> to see when computer makes approximation in mathematical calculations when I use Python</p>

<p><strong>Example of the problem:</strong></p>

<p>My old teacher once said the following statement</p>

<pre><code>You cannot never calculate 200! with your computer.
</code></pre>

<p>I am not completely sure whether it is true or not nowadays.
It seems that it is, since I get a lot zeros for it from a <a href="http://stackoverflow.com/questions/1041348/unable-to-make-a-factorial-function-in-python">Python script</a>.</p>

<p><strong>How can you see when your Python code makes approximations?</strong></p>
