title: Merge two css class for div element
body: <p>I have below css classes and want to merge to one,</p>
  
  <pre><code>.classA {
    height: 500px;
    width: 800px;
  }
  
  .classB {
   height: 800px;
  }
  
  .classB &gt; div {
   xxxx
   yyyy
  }
  
  .classA &gt; div {
   xxxx
   yyyy
  }
  </code></pre>
  
  <p>Here 'ClassA > div' and 'classB > div' have the same properties. So i need to make this as single class to apply to div element.</p>
  
  <p>Please help.</p>