Which number should replace both the asterisks in (* /18) x (*/162) = 1 ?	Select the correct option: A) 27 B) 36 C) 54 D) 72 E) 90

Rationale: let ( y / 18 ) x ( y / 162 ) = 1 y ^ 2 = 18 x 162 = 18 x 18 x 9 y = ( 18 x 3 ) = 54 the answer is c .
Answer: C