table {
    border-spacing: 0;
    border-collapse: collapse;
}

td {
    height: 50px;
    border: 1px solid black;
    text-align: center;
    vertical-align: top;
}

table.t1 {
    width: 75%;
    margin: 0 auto;
}

table.t1 td {
    width: 33.33%;
}

table.t2 {
    width: 100%;
}

table.t2 td:first-child {
    width: 28%;
}

table.t3 {
    width: 80%;
    margin: 0 auto;
}

table.t3 td {
    width: 33.33%;
}

table.t3 td.t3-bigger {
    height: 200px;
}