div.tudo{
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    width:975px;
    margin:0 auto;
    background-color: khaki;
}

div.esquerda {
    width: 300px;
    float: left;
    background-color: darkkhaki;
}

div.meio {
    width: 375px;
    float: left;
}

div.direita {
    width: 300px;
    float: left;
    background-color: chocolate;
}

h1 {
    font-size: 100px;
    margin-left: 20%;
}