Here's how to convert that to kilometers using scientific notation:

* Light-year to kilometers: 1 light-year is approximately 9.461 x 10^12 kilometers.

* Calculation: 2.5 million light-years * 9.461 x 10^12 kilometers/light-year = 2.36525 x 10^19 kilometers.

Therefore, the distance to the Andromeda Galaxy is approximately 2.36525 x 10^19 kilometers.