JSFiddle - React, Tailwind, and code Playground

HTML

<div>
 <div class="leftDiv">left</div>
 <div class="rightDiv">right</div>
 <div class="centerDiv">center</div>
</div>

CSS

.leftDiv{
  float:left;
  width:400px;
  background-color: red;
}
.rightDiv{
  float:right;
  width:200px;
  background-color: blue;
}
.centerDiv{
  width:100px;
  margin: 0 auto;
  background-color: green;
}