[asfdsfggtfd]

∞ × 0 = 0

[thaumasiotes]

∞ × 0 is one of the most bog-standard indeterminate forms, not 0.

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

[xrisk]

No that's just ill-defined.

[Mindwipe]

I think that's the joke, but yes.