# Digits Multiplication

Elementary+
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You are given a positive number. Your function should calculate the product of the digits excluding any zeroes.

For example: The number given is 123405. The result will be 1*2*3*4*5=120 (don't forget to exclude zeroes).

Input: A positive integer (int).

Output: The product of the digits as an integer (int).

Examples:

assert checkio(123405) == 120
assert checkio(999) == 729
assert checkio(1000) == 1
assert checkio(1111) == 1

How it is used: This task can teach you how to solve a problem with simple data type conversion.

Precondition:

• 0 < number < 106

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