To determine how long it will take for the math club's car to travel the 63-meter length of the race track, you would use division. Specifically, you would divide the total distance (63 meters) by the speed of the car (9 meters per second).
The calculation would be:
\[ \text{Time} = \frac{\text{Distance}}{\text{Speed}} = \frac{63 \text{ meters}}{9 \text{ meters/second}} = 7 \text{ seconds} \]
So, you'd use division to solve this problem.