To solve this problem it is necessary to apply the concepts related to the kinematic equations of movement description, which determine the velocity, such as the displacement of a particle as a function of time, that is to say
[tex]v = \frac{x}{t}\rightarrow x = v*t[/tex]
Where,
x = Displacement
v = Velocity
t = Time
Our values are given as,
[tex]v=3*10^8m/s[/tex]
[tex]t = 1.33 s[/tex]
Replacing we have that,
[tex]x=v*t[/tex]
[tex]x=(3*10^8)(1.33)[/tex]
[tex]x = 399'000.000m[/tex]
Therefore the distance from Earth to the Moon is 399.000 km