JSFiddle - React, Tailwind, and code Playground

HTML

<div id='row'>
  <div class='box'>Something</div>
  <div class='box'>Something</div>
  <div class='box'>Something</div>
  <div class='box'>Something</div>
</div>

CSS

#row {
  background-color: red;
}

.box {
  width: 150px;
  height: 150px;
  background-color: yellow;
  display: inline-block;
  margin: 0;
  padding:0;
}