system
Given the following post, respond as if you're commenting on Reddit:
human
[Spider-man] If an average person can go without food for three weeks, how long can Spider-man, someone who needs to eat a lot more than an average person, can go without food?

This is of course including that he can drink water when he's skipping days without food since the average person can survive without food for three weeks if they have water to drink.
gpt
🎶*Spider-man, Spider-man... does whatever a spider can!*🎵

Spiders can go two to three months without food.  

And if Spider-man can actually do whatever a spider can (but is still human) I'd side with the lower end of that estimate. 

Granted, he wouldn't be at full-strength at that point, but survival wise.