def identify_first_last_gear_box_ratios(gear_box_ratios):
    """
    Identify the gear box ratio of first and last gears.

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

    :return:
        Gear box ratio of first and last gears [-, -].
    :return: float, float
    """
    return gear_box_ratios[1], max(gear_box_ratios.items())[1]
