JSFiddle - React, Tailwind, and code Playground

HTML

<div class='unit'>number1</div>
<div class='unit'>number2</div>
<div class='unit'>number3</div>

CSS

.unit{
  border: solid 2px yellow;
  display:table-cell;
  height: 50px;
  width: 50px;
  text-align: center;	
  vertical-align: middle;
}