What is Log Base 9 of 81?

The below is the work with steps to find what is log base 9 of 81 shows how the input values are being used in the log base 9 functions. Formula:
log_b(x) = y, if b^y = x

Input:
x = 81
b = 9

Solution:
y = log₉ 81
= log₉ 9²
= 2 log₉ 9 = 2 x 1
log₉ 81 = 2
log₉(81) = 2