Einstein Mass Energy calculation  

Mass:
m = E/c^{2}
Speed of Light in a Vacuum:
c = √E/m
Where,
E = Energy,
m = Mass,
c = Speed of Light in a Vacuum.
Example:
Calculate the Einstein Mass energy for the given details.
Mass (m) = 25 kg
Speed of Light in a Vacuum(c) = 5 m/s
Solution:
Apply formula:
E = mc^{2}
E = 25*52
E = 25*25
E = 625 J
Energy (E) = 625 J