.div_header {
    text-align: center;
    margin-top: 5%;
}

.body {
    font-family: 'Times New Roman', Times, serif;
    background-color: rgb(64, 64, 64);
    color: white;
}

.div_calculations {
    margin-top: 10%;
    margin-left: 5%;
}

.output {
    color: red;
}