How to format and design HTML Table like Excel sheet using CSS

This way

    <table style = "border-collapse:collapse">
        <tr>
            <td style = "width:20px;border:1px solid black" align = "center">
                1
            </td>
            <td style = "width:20px;border:1px solid black" align = "center">
                1
            </td>
            <td style = "width:20px;border:1px solid black" align = "center">
                1
            </td>
        </tr>
        <tr>
            <td style = "width:20px;border:1px solid black" align = "center">
                1
            </td>
            <td style = "width:20px;border:1px solid black" align = "center">
                1
            </td>
            <td style = "width:20px;border:1px solid black" align = "center">
                1
            </td>
        </tr>
    </table>