1. Understand the Units:

* Speed of Light: The speed of light in a vacuum is approximately 299,792,458 meters per second (m/s).

* Time: We're given 8.64 x 10^4 seconds (which is equivalent to 24 hours, or one day).

2. Formula:

Distance = Speed x Time

3. Calculation:

* Distance = 299,792,458 m/s * 8.64 x 10^4 s

* Distance ≈ 2.59 x 10^13 meters

4. Conversion (Optional):

You can convert meters to other units like kilometers:

* Distance ≈ 2.59 x 10^13 meters / 1000 meters/kilometer

* Distance ≈ 2.59 x 10^10 kilometers

Answer: Light travels approximately 2.59 x 10^13 meters (or 2.59 x 10^10 kilometers) in 8.64 x 10^4 seconds (one day).