JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="left"> left </div>
    <div class="right"> right </div>
    <div class="right"> right </div> 
  </div>

CSS

div{
    background-color: lightGrey;
    border:1px solid grey; 
}

.container{
    width: 100%; 
    float: left; 
}

.left{
    float:left; 
    width:4em;
    height: 3em; 
}

.right{
    float:right; 
    width:4em;
    height: 5em; 
}