JSFiddle - React, Tailwind, and code Playground

HTML

<div class='container'>
  <div class='item'>
    <span>Hello 1</span>
  </div>
  <div class='item'>
    <span>Hello 2</span>
  </div>
  <div class='item'>
   <span>Hello 3</span>
  </div>
  <div class='item'>
    <span>Hello 4</span>
  </div>
  <div class='item'>
    <span>Hello 5</span>
  </div>
  <div class='item'>
    <span>Hello but longer!</span>
  </div>
</div>

CSS

.container {
  width: 300px;
  margin: 0 auto;
 }

.item {
  width: 50%;
  float: left;
  background: #e3e3e3;
  margin: 10px 0;
  padding: 20px;
  box-sizing: border-box;
 
  display: flex;
  justify-content: center;
}