OxB: When FLOOR(REAL) is not applicable

That’s the weirdest thing I’ve ever seen.

I got 8 plastic bags of coffee powder (20) after I stormed a hotel.
And you know what? A plastic bag of coffee powder (20) takes 1 volume per each.
But then I made it “Plastic bag of coffee powder (19)” and magically this thing started to take 0 space!

So I ate by one pile of coffee powder in each bag and freed extra 8 volume.

UPD: Oops, I messed up with the title a little.