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;
    overflow:hidden;
}

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