JSFiddle - React, Tailwind, and code Playground

HTML

<div id="root">
    
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    
</div>

CSS

#root{
    background: red;
    width: 400px;
    font-size:0;
}

#root > div{
    display: inline-block;
    width: 50px;
    height: 50px;
    background: blue;
    margin-left: calc((100% - 200px) / 5);
}
#root > xdiv:first-child
{
    margin-left: 0;
}