A local amusement park has many roller coasters. On the roller coaster Gargantuan, the train has \(8\) cars, seating \(4\) guests in each car at one time. A ride starts every \(3\) minutes.
If the roller coaster was full every time, how many people rode the Gargantuan in a half an hour from the first ride starting? Justify your answer.
Themes: Geometry & Measurement, Number Sense