How to justify spacing without using flexbox?
<p>I'm not using flexbox because of less browser support.
Now I have 6 li in a wrapper. Wrapper is of 900px and each li is of 400px. How am I able to justify spacing between them? so two elements are in one line and each having margins of 25px at both left and right side. I also have to make them responsive so I don't want to just hard code them. refer to image please.</p>

<p><img src="https://i.imgur.com/ON1E7Wf.png" alt="&#39;image&#39;"></p>