title: Add decimal point after two digits from left in pandas df columns
body: <p>I have a df like below with int dtype.
  I want to Add decimal point after two digits from left for each value in pandas df columns</p>
  
  <h1>My Df</h1>
  
  <pre><code>Descrip     a         b
  VP3         52366599  10718233
  VP3         522842650 106751
  .
  .
  VP4         5232937   10542931
  VP5         522842650 10615982
  .
  .
  </code></pre>
  
  <h1>Requirement</h1>
  
  <p>I want my Df to be like </p>
  
  <pre><code>Descrip     a         b
  VP3         52.366599  10.718233
  VP3         52.2842650 10.6751
  .
  .
  VP4         52.32937   10.542931
  VP5         52.2842650 10.615982
  .
  .
  </code></pre>
  
  <p>Since values inside the dataframe doesn't have same number of digits, so i cannot able to process the easy way by dividing each number by 10e(something)</p>
  
  <p>I hope there will be an easy method to solve this issue in pandas</p>