if the paper is folded 42 times, then there would be 2^42 (=4,398,046,511,104) layers of paper. Standard office paper is 0.1 mm thick. So
2^42 / 10 = 439 billion mm, / 1000 = 439 million meters, / 1000 = 439,000 kilometers,
which roughly matches the 405,000 km to the moon (at the farthest point in its elliptical orbit)
But the same math would work the other way on the length/width of the paper:
If you tried this with a standard 8.5* 11(A4 page), then the width would be
(8.5 * 11) / 4.3 trillion square inches
=93.5 / 4.3 trillion=2.2 * 10^(-11) square inches.
It's hard to know the exact dimensions of a molecule of "paper"(cellulose,mostly),it came out as in the neighborhood of 1 * 10^(-11) inches.
Therefore, it's fair to say that folding a sheet of paper 42 times (if you could) would basically rearrange all the molecules of the page into a stack of single molecules, that would reach the moon.
İngilizce bir kaynak.