how can create table but within table there forma

Answer 1

Can reformulate the question?
if you want to create a table =>>

<table style="width:100%">
<tr>
<th>Firstname</th>
<th>Lastname</th>
<th>Age</th>
</tr>
<tr>
<td>Jill</td>
<td>Smith</td>
<td>50</td>
</tr>
<tr>
<td>Eve</td>
<td>Jackson</td>
<td>94</td>
</tr>
</table>

Answer 2

Nested tables need to be inside cell elements:

<table>
<tr>
<td>
<table><tr><td>some text</td></tr></table>
</td>
</tr>
</table>