<table>

<table border="6">
    <caption>table</caption>
    <tr>
        <th>name</th>
        <th>age</th>
    </tr>
    <tr>
        <td>jiao</td>
        <td>26</td>
    </tr>
    <tr>
        <td>fftu</td>
        <td>86
 
</td>
    </tr>
    <tr>
        <td colspan="2" rolspan="2" align="center">
            <button type="submit">提交</button>
        </td>
    </tr>
</table>

HTML <table>