body {
    height:100%;
    margin: 0;
    font-size: 24px;
    color: #fff;
    line-height: 50px;
    text-align: center;
}

#calculator {
    position: absolute;
    top: 0px;
    left: 0;
    bottom: 0;
    right: 0;
}

.floating {
    float: left;
    position: absolute;
    right: 20px;
    bottom: 20px;
    height: 50px;

    width: 200px;

    background-color: grey;
    border-radius: 5px;
    font-style: normal;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 15px;
    color: #FFFFFF;
}