Explain how its possable that a strand of dna can fit into a nuclus that is microscopic

It is condensed and packaged into chromosomes.

So i'm understanding your question as "how can DNA fit into a nucleus when its super super small"

Well, DNA is unpacked/unwound in the nucleus when it is not going through any replication. DNA is really small if you think about it. Just a sugar and phosphate backbone.

When it is going through replication the DNA is super packed together into Chromosomes. There a series of folds that the DNA goes through to achieve this super compact state of chromosomes. Proteins and scaffolds aid in connecting and holding together this highly compact state.

Ummm, because a strand of DNA is even MORE microscopic?

A DNA molecule is LONG compared to its length, and compared to other molecules.
But it is NOT long compared to a piece of rope . . .