title: Dividing large number by 10 in python gives the wrong result
body: <p>Say I want to remove the last digit of a number <code>n</code>.
  For that I use the code <code>int(n/10)</code>.</p>
  <p>Sadly this gives the wrong result for large numbers.
  For example <code>n = 4474630975855204960</code> divided by <code>10</code> gives <code>447463097585520512</code>.</p>
  <p>What's the reason for this behavior? How can I fix it?</p>