.parent{
    height: 500px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 5%;
}
.child{
    height: 100px;
    width: 100px;
    border: 2px solid black;
    display: flex;
    justify-content: center;
    align-items: center;
}
#result{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 50px;
}