def calculate_final_drive_powers_in(final_drive_powers_out,
    final_drive_efficiencies):
    """
    Calculates final drive power [kW].

    :param final_drive_powers_out:
        Power at the wheels [kW].
    :type final_drive_powers_out: numpy.array | float

    :param final_drive_efficiencies:
        Final drive torque efficiency vector [-].
    :type final_drive_efficiencies: numpy.array | float

    :return:
        Final drive power in [kW].
    :rtype: numpy.array | float
    """
    return final_drive_powers_out / final_drive_efficiencies
