.table td {
    padding: 5px 10px;
}

.jumbotron {
    padding: 0.2rem 1.3rem;
}
hr {
    margin-top: .5rem;
    margin-bottom: .5rem;
}

.multiplication{
    margin-bottom: 50px;
}

#article {
    padding: 3% 10% 0;
}