JSFiddle - React, Tailwind, and code Playground

HTML

<body>
	<table>
		<tr>
			<td class="no_border"></td>
			<td>R1:C2</td>
		</tr>
		<tr>
			<td colspan="2">R2:C1</td>
		</tr>
	</table>
</body>

CSS

table {
		width: 100%;
		border-collapse: collapse;
	}

	td {
		padding: 5px;
		height: 23px;
		width: 50%;
		border: solid black 1px;
	}

	td.no_border {
		border: none;
	}