What would be the cost to each person in the united states to build a death star if it's cost would be 9*10^14 dollars? express your answer to one significant figure.

The Death Star makes me nervous and I'd rather not discuss it.
Let's just do the math.

The population of the USA is estimated as 316.1 million today.

($9 x 10^14) / (3.161 x 10^8) = $2.85 million per person 

Europe needs to build a trump-like wall that will spread across europe making it impossible for migrants to cross they need to spread pig guts all over this wall so the muslims will never consider crossing into europe..you might be asking "can't they just fly over with planes? " well yes they can so we will install thaad missile protections system to shoot down any aircraft that violates europe's air fourth would be to start a fourth reich in germany.. last but not least.. make europe great again!

The peak above is part of the  sierra madre occidentals ,  a chain of volcanic mountains that runs through the middle of central america.