Trailing Zero !!!!

We know,

N! = 1 X 2 X 3 X ........ X (N-1) X N .

Now , 5! = 1 X 2 X 3 X 4 X 5 = 120 .

So 5! contains one trailing 0 .

Now you to tell me , how many trailing zero contains 1000000!

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