CRVD Interpretation of E = mc²

Prof. Einstein seemed to multiply mass by C to create a term representing momentum-like behavior for the mass ( ), perhaps conceptualizing the inertia associated with the mass even if it were somehow accelerated to . However, since according to his own theory, Special Relativity, no object with non-zero rest mass can reach the speed of light, he multiplied this quantity once more by so that the entire mass's inherent inertia, represented by , would be equivalent to the description of a massless entity (the photon) moving at the speed of light. This operation resulted in the famous expression where the inherent inertia of mass is equated to the kinetic manifestation in a massless carrier traveling at the ultimate speed limit.