German Question

I read a german essay where God asks a donkey, a dog, a monkey, and a human if they'd want 30 years to live.
The donkey, dog and monkey refuse
The human asks for the years they refused.

Anyway, there is one line I couldn't translate correctly. This is last part of conversation between God and the donkey. Here's how it goes:

,,Ach'', sagte der Esel, ,,das ist eine Lange Zeit. Mein Leben ist schwer. Lass mich nicht so lange leben!''
,,Nun gut'', sprach Gott, ,,dann will ich dir achtzehn Jahre schenken, und do sollst nur zwolf Jahre leben.''

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How does:
dann will ich achtzehn Jahr schenken --> translate to --> I will take away your 18 years.
Shouldn't it be:
dann will ich dir achtzehn Jahre wegnehmen.

I searched google but schenken always translated as send/give.
It's not take away.

Is this a typo in the book?

 

Hmm... Is there any expression dir schenken that implies take away from you.
Idk.. I google searched a lot but couldn't find.

 

The human comes later in the scene.
First scene is between God n donkey
Second is between God n dog
3rd between God n monkey.
Here is a photo of the essay:
the line is in 1st paragraph, last sentence

 

That makes sense. Thanks a lot.