Ask HN: What kind of computations would an unassited Matrioshka brain perform?

https://en.wikipedia.org/wiki/Matrioshka_brain

For example, let's consider earth. Earth is kind of partial implementation. It takes energy from the sun. It uses this energy to perform computations(in animals' brains and similar) with the goal to continue to compute in the future. It generates heat as a side effect. The laws of physics are the instructions earth can shuffle to perform even more computation.