#calculator {
    border: solid black 1px;
    display: inline-block;
    padding: 4px;
    border-radius: 4px;
}

#display {
    position: relative;
    padding: 5px;
    width: 205px;
    text-align: right;
}

#buttontable input {
    padding: 0px;
    width: 40px;
    height: 40px;
}