JSFiddle - React, Tailwind, and code Playground

HTML

<div><span>&radic;</span> = ?</div>

CSS

div {
    font-style: italic;
    font-size: 2em;
    padding: 20px;
    margin: 10 100px 0 100px;    
    border: 1px solid #DBA901;
    text-align: center;    
}

span::after {
    content: '81';
    padding: 2px 0 5px 5px; 
    display: inline-block;
    box-shadow: inset 0px 2px  0px #0B2161;
}