JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="col-l">left</div>
    <div class="col-r">right</div>
    <div class="col-c">center</div>
</div>

CSS

.wrapper {
	outline: 1px solid #C00;
	margin: 0 auto;
    padding: 5px;
    overflow: hidden;
}

.col-l {
    float: left;
    width: 100px;
    margin: 0 5px 0 0;
    padding: 5px;
    background: pink;
    border: 2px solid red;
}

.col-r {
    float: right;
    width: 200px;
    margin: 0 0 0 5px;
    padding: 5px;
    background: lightgreen;
    border: 2px solid green;
}

.col-c {
    overflow: hidden;
    padding: 5px;
    background: silver;
    border: 2px solid grey;
}