JSFiddle - React, Tailwind, and code Playground

HTML

<div id="a">
	<div id="c">456</div>
	<div id="b">123</div>	
</div>

CSS

#a{
	width: 80%;
	background-color:#999;
	height:100%;
	overflow:hidden;
}
#b{
	background-color:#06F;
}
#c{
	width: 50px;
	float:right;
	background-color:#9C6;
}