JSFiddle - React, Tailwind, and code Playground

HTML

<div id="fixed">
    Fixed Left Column
</div>

<div id="variable">
    Variable Right Column
</div>

CSS

#fixed {
    width: 220px;
    float: left;
}

#variable {
    margin-left: 240px;
}

div {
    border: 1px solid #333;
    height: 300px;
    text-align: center;
    line-height: 290px;
    font-size: 20px;
    font-family: Arial;
    font-weight: bold;
    background-color: #666;
    color: #fefefe;
}