tr { display: block; float: left; }
th, td { display: block; }
th {padding: 2%;
    font-size: 20px;
    width: 200px;}
td {padding: 2%;
    font-size: 20px;
    width: 200px;}
div {text-align: center;}
#box2{
    flex: auto;
}
#box3{
    max-width: fit-content;
    margin: 0 auto;
}