title: Excel date difference #Value error
body: <p>I have two columns:
  C2=4/27/15 11:00:26 AM
  D2=4/27/15 11:01:46 AM </p>
  
  <p>I'm trying to calculate the time difference in seconds using the formula 
  =(D2-C2)*24*60*60</p>
  
  <p>But I'm getting #Value error.</p>