<html>
<head>
<title>Это таблица</title>
</head>
<body>
<h1 align="center">Таблица</h1>
<table border="1" align=center width="80%" height="300">
<tr>
<td colspan="2">1</td>
<td>3</td>
</tr>
<tr>
<td rowspan="2">4</td>
<td>5</td>
<td rowspan="2">6</td>
</tr>
<tr>
<td>8</td>
</tr>
</table>
</body>
</html>