Pokémon: Heavy Slam Maximum Damage

After learning how Copperajah with Heavy Metal is the heaviest Pokémon in the world, I had a thought. What is the maximum damage Heavy Slam could do? The lightest Pokémon to be weak to Steel is Carbink with a weight of 12.6 lbs. If Copperajah maxed out its Attack, Terastallized to Steel, have max Attack IVs, and be level 100, while Carbink is level 1, has max lowered its Defense, max lowered Defense IVs, and is holding a Float Stone, what is the most insane amount of damage Copperajah can do with Heavy Slam?