Chemistry Help, Boyle's Law?

Question

At a deep-sea station 200. m below the surface
of the Pacific Ocean, workers live in a highly
pressurized environment. How much gas at
STP must be compressed on the surface to fill
the underwater environment with 2 × 107 L
of gas at 23 atm? Assume that temperature
remains constant.
Answer in units of L.

Answer 1

(X L)(1atm) = (2x10⁷ L)(23atm)

Solve for x

Answer 2

P1V1= P2V2

P1 = 1 at 

V1 = 2* 10⁷

P2= 23 at

 

V2 = P1 V1/ P2

Compression = Difference in volumes