Question: map of mutiply onto expressions

Hello people in mapleprimes,

I have a problem about map.

restart;
map(`*`,op([1/x,y,z]));

The output of this code is not y*z/x, but  (x*y*z)^(-y*z).

I can't understand why this occurs.
Can't you teach me about this?

Thanks in advance.

Nov_3_2017_mapleprimes.mw

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