def PowerStack_Calc(Power, N):
    """
    Calculate power_stack.

    :param Power: single cell power [W]
    :type Power : float
    :param N: number of single cells
    :type N : int
    :return: power stack [W] as float
    """
    try:
        result = N * Power
        return result
    except TypeError:
        print(
            "[Error] Power Stack Calculation Error (Power:%s, N:%s)" %
            (str(Power), str(N)))