How could thing as tiny as a nano-machine (aka VIRUS unit) eventually digest something as huge as a Dyson Sphere (aka Stareater)?
In
Rome's Revolution, Rei, with OMCOM's help, came up with a "simple" solution.
The answer lies in the exponent. I assumed the VIRUS units were so tiny, they only weighed a nanogram. I started with 1000 units and assumed they took 3 minutes to reproduce.
At the end of 3 minutes, you now have 2000 units with a weight of 2 micrograms. After six minutes, you have a weight of 4 micrograms and so on.
After an hour and a half, the mass weighs one kilogram. After 5.5 hours, the mass weighs the same as the Moon. After 5.7 hours it weighs the same as the Earth. After 6 hours, it weighs as much as Jupiter. Finally, after 7 hours, it weighs as much as the Sun and certainly that is big enough to kill a Stareater.
So the Stareater provided the mass resulting in its own death. Very much like a virus can kill its host, hence the clever name.