Converting bytes to GB in C#?

Question

I was refactoring some old code and came across the following line of code to convert bytes to GB.

decimal GB = KB / 1024 / 1024 / 1024;

Is

Answer 1

In theory, this is faster (precomputing the constant to do multiplication instead of division). It's probably not used often enough to matter, but just in case.

double const KbToGbFactor = 1d / 1024 /1024;

double gb = kb * KbToGbFactor;