Given this paragraph about Mass–energy equivalence, tell me what each part of the equation E=mc² stands for.

Context: The formula defines the energy E of a particle in its rest frame as the product of mass with the speed of light squared. Because the speed of light is a large number in everyday units, the formula implies that a small amount of "rest mass", measured when the system is at rest, corresponds to an enormous amount of energy, which is independent of the composition of the matter.

Answer: E is for energy, m is for mass, and c² is for the speed of light squared