

… More like 2.5*10^728 grams. Which would be like taking the number of particles in the (observable*) universe, making a new universe for each one, then taking the number of particles in all those universes and making a universe for each one… 9 levels deep. That many grams.
(*Every time I say universe I mean observable)
Edit: Oops, I forgot it’s 20 years, not just one. I think that’s Multiply both the 728 and the 9 by 20.
Yeah, got better numbers from a better calculator:
1.8e14665 grams
That’s 183 levels of universes of universes.
Obvious solution is to not only return that one, but then go to a different brand of store, buy a bunch, then return them the next day. Repeat for each kind of store you can reach that sells them.