JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
    </tr>
    <tr>
        <td colspan="2">&nbsp;</td>
        <td>&nbsp;</td>
    </tr>
    <tr>
        <td colspan="3">&nbsp;</td>
    </tr>
</table>

CSS

td {
    border: 1px solid #000;
    min-width:3em;
}