<h2>Numbers categorized by base.</h2>

<p>Number bases are mathematical systems that use a specific set of digits and rules to represent numbers.</p>

<table border='1'>
	<tr><th colspan='4'>Base-4, mul</th></tr>
	<tr>
		<td>Ã—</td>
		<td>1</td>
		<td>2</td>
		<td>3</td>
	</tr>
	<tr>
		<td>1</td>
		<td>1</td>
		<td>2</td>
		<td>3</td></tr>
	<tr>
		<td>2</td>
		<td>2</td>
		<td>10</td>
		<td>12</td>
	</tr>
	<tr>
		<td>3</td>
		<td>3</td>
		<td>12</td>
		<td>21</td>
	</tr>
</table>
