system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] How much stronger is Spider-Man when he has the Black Suit?

When he can bring himself to wear it at least?
gpt
It varies, usually between 2x-10x stronger.

Given the other material about how he's always holding back and how he routinely beats symbiote worn by others, the symbiote might not even boost his strength much at all.  It might just be affecting his psychology to make him hold back less.