Imagine you're having breakfast at home and wave at the passengers of a plane passing by your house. You live on the 739th floor of X-Seed 4000, an entire city contained in one massive skyscraper. It sounds unrealistic right now, but one day it may become a reality. The current record holder when it comes to height is the Burj Khalifa, with 163 floors. The engineers had to drill 192 holes under the 110,000-ton concrete foundation of this massive construction. So, what would it take to finish a project which is way more massive than that?

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