The questions below are based on the given Series-I. Series-I follows a certain pattern, you are required to follow the same pattern in Series-II and answer the question given below:

I) 84, 42, 63, 157.5, 551.25

II) 320 ...... 9450, where 9450 is wth term.

If X is the sum of the digits of the (w-2)th term of Series II, what is the value of (X² - 2X)?