JSFiddle - React, Tailwind, and code Playground

by yaero

HTML

<div class="container">
	<div class="child"></div>
</div>

CSS

.container {
	background-color: red;
	width: 500px;
	height: 500px;
}

.child {
	background-color: blue;
	width: calc(100% / 3 - 10px);
	height: 200px;
}