JSFiddle - React, Tailwind, and code Playground

HTML

<div id='container'>
  <span class='box'>Content</span>
  <span class='box'>Content</span>
  <span class='box'>Content</span>
  <span class='box'>Content</span>
</div>

CSS

#container {
	width: 960px;
	height: 960px;
	background-color: #ccc;
}

.box {
	width: 300px;
	height: 300px;
	background-color: blue;
	display: inline-block;
}