I say again you have a 5 carbon chain.
C-C-C-C-C on the middle carbon there are two substituents two methyl groups.
the longest chain is 5 C atoms i.e. a pentane, on the middle carbon number 3 are two methyl substituents, i,e, dimethyl.
so you have 3,3-dimethylpentane.
No magic, that's it.