def identify_n_gears(gear_box_ratios):
    """
    Identify the number of gears [-].

    :param gear_box_ratios:
        Gear box ratios [-].
    :type gear_box_ratios: dict[int | float]

    :return:
        Number of gears [-].
    :rtype: int
    """
    return max(gear_box_ratios)
