JSFiddle - React, Tailwind, and code Playground

HTML

<div id='container'>
  <div id='left-block'>Left</div>
  <div id='right-block'>Right</div>
</div>

CSS

#container
{
  background: grey;
  display: inline-block;
  width: 100%;
}
#left-block {float: left; font-size:74px;}
#right-block
{
  float: right;
}