【Example 4】8 people sit in two rows, with 4 people in each row, where 2 specific people must sit in the front row, and 1 specific person must sit in the back row.

Here, the 2 people who must sit in the front row and the 1 person who must sit in the back row are all constrained elements, but no specific position is explicitly designated as a constrained position.
Example 4 Solution: First, arrange the 2 people who want to sit in the front row, there are $A_{4}^{2}$ different ways; then arrange the 1 person who wants to sit in the back row, there are $A_{4}^{1}$ different ways; finally, arrange the remaining 5 people, since they can sit in any of the 5 remaining seats, there are $A_{5}^{5}$ different ways. Therefore, by the multiplication principle, there are a total of $A_{4}^{2} \cdot A_{4}^{1} \cdot A_{5}^{5}=5760$ different seating arrangements.

Since Example 4 does not specify any restricted positions, we can only adopt the strategy of prioritizing the arrangement of restricted elements. However, this is not the case in Examples 3 and 5.