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def func(x,y):
    return sum([i[0] * i[1] for i in list(zip([ord(s) - 48 for s in x], [10 **i for i in list(range(len([ord(s) - 48 for s in x])))[::-1]]))]) * sum([i[0] * i[1] for i in list(zip([ord(s) - 48 for s in y], [10 **i for i in list(range(len([ord(s) - 48 for s in y])))[::-1]]))])