Solving Simple Power Problem: Grandfather Clock + 3.70kg Weight

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A grandfather clock is powered by the descent of a 3.70 kg weight.
If the weight descends through a distance of 0.700 m in 3.00 days, how much power does it deliver to the clock?

I have tried this a million times, but I'm just having a mental block.
If someone could please help me out & explain how to do this, I'd be super grateful!

Thank you so much!
 
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power is energy/time

The energy is the gravitational energy of the weight