## Task 4 - 130914

Under $n$! (read as $n$-factorial) one understands the product of all natural numbers from 1 to $n$; that is,

$$
n!=1 \cdot 2 \cdot 3 \cdot \ldots \cdot(n-3) \cdot(n-2) \cdot(n-1) \cdot n
$$

Determine for $n=1000$ the number of zeros at the end of the number $n$! (trailing zeros).