What is Log Base 5 of 625?

The below is the work with steps to find what is log base 5 of 625 shows how the input values are being used in the log base 5 functions. Formula:
log_b(x) = y, if b^y = x

Input:
x = 625
b = 5

Solution:
y = log₅ 625
= log₅ 5⁴
= 4 log₅ 5 = 4 x 1
log₅ 625 = 4
log₅(625) = 4