#sortable {
    list-style-type: none;
    margin: 10px;
    padding: 0;
    width: 830px;
}

#sortable li div {
    margin: 1px 1px 1px 1px;
    padding: 1px;
    float: left;
    width: 200px;
    height: 200px;
    font-size: 4em;
    text-align: center;
}

#alignImage {
    text-align: center;
}

ul {
    float:left;
    list-style: none
}