Select the number of participants and start timing. When the first participant enters the goal select the stop button to count their time. Every time one of the participants enters the goal, select the stop button again and thus count his time. You will thus get the times of the N participants.
The maximum number of participants in the same competition is 30.
References:
https://unsplash.com/photos/poa-Ycw1W8U
https://www.1001fonts.com/digital-7-font.html
https://www.freepik.com
https://material.io