speaking from a maths (set theory) point of view, the numbers mentioned in cosmology aren’t that difficult to comprehend. they are big, for sure, but they are still a sequence of digits.
there are “more” real numbers between (0,1) than there are objects in the universe (including the number of miles).
furthermore, the number of real numbers in (0,2) is the “same” as the number in (0,1).
now, that is weird. but that’s infinite sets for you. :)