#division{
    display:flex;
    flex-direction: column;
    width: fit-content;
}

#division #denominateur {
    border-top: 1px solid black;
}

.denominateur{
    border-top: 1px solid black;
    width: fit-content;
}

#nav_puissance{
    display: flex;
}

#nav_puissance .button_generator{
    margin-left: 10px;
    margin-right: 10px;
}
#nav_puissance .button_generator:nth-child(1){
    margin-left: 0;
}