JSFiddle - React, Tailwind, and code Playground

HTML

<div id="fuck">
    <div id="left">
        left<br />
        left<br />
        left<br />
        left<br />
        left<br />
        left<br />
        left<br />
        left<br />
    </div>
    <div id="right">
        right<br />
        right<br />
    </div>
</div>

CSS

#left {        
    background-color:#ff0000;
    margin-right: 260px;
}
#right {
    float:right;
    background-color:#00FF00;
    width:250px;
}