25 log 125 = 81 log 27 = 4 log 3 * 6 log 16 * 25 log 36 =

1. 25 log 125 = 5² log 5^3 = 3/2 . 5 log 5 =3/2.1=3/2
2. 81 log 27 = 3^4 log 3^3 = 3/4 . 3 log 3 = 3/4.1=3/4
3. 4 log 3 . 6 log 16 . 25 log 36 = 2/2. 5 log 6 * 2. 6 log 4 * 4 log 3 = 2 . 5 log 3