JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>
<div></div>
<div></div>
<div></div>
<div></div>

CSS

html,body{
    padding: 0;
    margin: 0;
}

div {
    float: left;
    width: 50px;
    height: 50px;
    background-color: red;
    margin-right: calc( (100% - 5 * 40px) / 4 );
}
div:last-child{
    margin-right: 0;
}