App Kindle amazon...how to export an ebook?

Hello guys, I am not a developer here, just an usual customer. I want to ask you how can I export an ebook from the android Kindle app to my pc? Then I searched on the web hot to convert the file in pdf. But I can't export the ebook. Could you please help me? I think this section is good for my topi...I hope! Thank you so much!

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