【Example 4】To select one outstanding collective in learning, discipline, 
hygiene, and sports from 8 classes of the third year of high school, how many different selection results are there?
For each selection of an advanced collective, one class is chosen from the 8 classes, namely Senior 3 (1), Senior 3 (2), ..., Senior 3 (8). Therefore, this is also a problem of repeated permutations, with a total of $8 \times 8 \times 8 \times 8=8^{4}=4096$ different ways of selection.