HTML-Calculator

<!DOCTYPE html>
<html>
<head>
<title>Exercise 4 - Calcucator </title>
<style>
table
{ background-color:grey;
 font-size:25px;
}
.button
{width:40px;
 height:40px;
 text-align: center;
 font-size:25px;
 }
.button0
{width:85px;
 height:40px;
 text-align: center;
 font-size:25px;
}
.result
{width:170px;
 height:40px;
 text-align:right;
 font-size:25px;
}

</style>
</head>

<body>
<form name="calculator" action="apply-now.php" method="post">
    <table border="1">
     <tr>
        <td colspan="4"><input type="text" class="result" name="result" value="123"/>
        </td>
     </tr>
     <tr>
        <td>
            <input type="button" class="button" name="button1" value="1"/>
        </td>
        <td>
            <input type="button" class="button" name="button2" value="2"/>
        </td>
        <td>
            <input type="button" class="button" name="button3" value="3"/>
        </td>
        <td>
            <input type="button" class="button" name="buttonPlus" value="+"/>
        </td>
    </tr>
    <tr>
        <td>
            <input type="button" class="button" name="button4" value="4"/>
        </td>
        <td>
            <input type="button" class="button" name="button5" value="5"/>
        </td>
        <td>
            <input type="button" class="button" name="button6" value="6"/>
        </td>
        <td>
            <input type="button" class="button" name="buttonMinus" value="-"/>
        </td>
        </tr>
    <tr>
        <td>
            <input type="button" class="button" name="button7" value="7"/>
        </td>
        <td>
            <input type="button" class="button" name="button8" value="8"/>
        </td>
        <td>
            <input type="button" class="button" name="button9" value="9"/></td>
        <td>
            <input type="button" class="button" name="buttonAddition" value="+"/>
        </td>
    </tr>
    <tr>
        <td colspan="2">
            <input type="button" class="button0" name="button0" value="0"/>
        </td>
        <td>
            <input type="button" class="button" name="buttonPoint" value="."/>
        </td>
        <td>
            <input type="button" class="button" name="buttonDivision" value="/"/>
        </td>
    </tr>
    </table>
</form>
</body>

</html>