from functools import reduce

if __name__ == '__main__':
    digits = [1, 10, 100, 1000, 10000, 100000, 1000000]
    number = ''
    for i in range(digits[-1]):
        number += str(i)
    results = [int(number[x]) for x in digits]
    result = reduce(lambda x, y: x * y, results, 1)
    print(result)