Sword Art Online 012 – Alicization Rising Chapter 7 – The Two Supervisors 19 "What's there to be surprised about, is it not logical if you only give it a little thought? The sizes of light cubes that store fluct lights, and actual brains, are limited and as such, so are the number of quantum bits that can be stored." Turning to Cardinal, calmly speaking on, I raised my right hand and requested clarification. "Ho-Hold on a moment. Erm... the «light cube» thing that's been popping up in our conversation from earlier is the medium that the fluct lights of the people in the Underworld are saved in, right?" "What, were you unaware of even that? Indeed, a light cube is shaped as a cube with a length of five centimeters, with each one able to perfectly contain the fluct light of a single Underworld inhabitant, not to mention no resources are necessary to save. A «Light Cube Cluster», with each side measuring three meters, was made by assembling them together." "Er, erm... gathered together, five centimeters each, three meters..." I tried to mentally calculate the total number of light cubes, but as I was dividing three hundred by five, Cardinal effortlessly spoke out the answer. "The logical value for the total would be two hundred and sixteen thousand. However, due to the existence of the «Main Visualizer», the main storage, there ought to be less than that." "Two hundred and sixteen thousand... So that's the maximum population of the Underworld, huh..." "Indeed. By the way, there is still a considerable amount of surplus space, so there is no need to worry about the number of empty cubes if you're in the mood to make a baby with some dame."