.btn{
    width: 50px;
    margin: 8px;
    font-weight: bold;
}

.calculate{
    margin-top: 100px;
    padding: 30px;
    background-color: rgb(92, 92, 91);
    border-radius: 25px;
}
input{
    margin-bottom: 20px;
    padding: 15px;
    border: none;
    background-color: rgb(225, 225, 241);
    border-radius: 5px;
    height: 50px;
}

.btn-success{
    width: 120px;
}