JSFiddle - React, Tailwind, and code Playground

HTML

<div class="cont">
    <div class="block">1</div>
    <div class="block">2</div>
    <div class="block">3</div>
</div>

CSS

.block {
    float:left;
    width:48px;
    height:20px;
    text-align:center;
    margin:0px;
    margin-right:10px;
    border:1px solid red;
}

.cont {
    width:180px;
    height:22px;
    border:1px solid green;
    background:yellow;
}