The resolution of the computer screen is 1280×720 what is the maximum number of colors that the palette can

The resolution of the computer screen is 1280×720 what is the maximum number of colors that the palette can contain if the amount of video memory is 900 KB.

I-900kb = 900 * 2 ^ 13 bits
K = 1280 * 720
N = 2 ^ i
N-?
I = K * i
(900 * 2 ^ 13) / (1280 * 720 * i)
We make abbreviations, I advise you to represent large numbers as a power of two (for example, 1280 = 10 * (2 ^ 7))
We get 2 ^ 3 = 8
i = 8
N = 2 ^ i
N = 2 ^ 8
N = 256