def calculate_multiplicative_score(penalties):
    """
    Calculate a multiplicate score on the passed in penalties.
    """

    cumulative_score = 9

    for penalty in penalties:
        current_score = 100 - penalty.value
        cumulative_score = cumulative_score * (current_score/100.0)

    cumulative_score = cumulative_score + 1
    cumulative_score = round(cumulative_score, 1)

    return cumulative_score