S koliko nula završava umnožak

?
How many zeros does the product

end with?
[lang=hr]
S koliko nula završava umnožak $1\cdot2\cdot3\cdot \ldots \cdot 35$ ?
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[lang=en]
How many zeros does the product $1\cdot2\cdot3\cdot \ldots \cdot 35$ end with?
[/lang]