What is the remainder when 81+82+83……+815 is divided by 6

What is the remainder when 81+82+83……+815 is divided by 6

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #74775