Given:
The length of the track is,
[tex]L=453\text{ m}[/tex]Dante runs 4 laps around the track.
The displacement is the difference between the final and the initial position.
As Dante completes 4 laps means she came to the starting point AFTER THE COMPLETE laps.
Hence the difference between the final and the initial position is zero.
So, the displacement is zero.