Traveling on a spaceship to Alpha Centauri A, 4.37 light years away, at a velocity of 0.92 c,
if you just calculate the time by dividing the distance by the velocity:
t = \frac{d}{v} = 1.496 x 10^8 sec = 4.74 years
Is this the time from the Earth reference frame?
Then the time on the spaceship...