How many years would it take to cross the galaxy at warp factor 9?

Update: show the math
Update 2: hint: warp factor 9 is 2^9 times the speed of light.
Update 3: morningfox got it right. It takes light 100,000 years to cross the galaxy. going 512 times light speed, it would take 100,000yrs /512 = 195 years.
7 answers 7