Well, typically, to factor relativistic effects, you would use the Lorentz factor (gamma) = 1/(1-(beta)^2) where beta=c/v
c=speed of light
I have not found a calculator that doesn't round 1/7.41*10^21 off to 0, though. which would make the factor 1...which is obviously problematic since what that means is that instead of this velocity being a huge fraction of the speed of light, it's instead just rounded off to being the speed of light. In short, matter doesn't do that.
basement dweller spotted
No more memes tagged with "manga" ;(