I know when I want to use a な-adjective as an adverb then we have to use に particle instead of な. For example:
簡単{かんたん}に説明{せつめい}しました。
But I'm curious how to use negated な-adjectives as adverbs. Maybe just should I put the に particle the end of the negated な-adjective? Something like this:
簡単{かんたん}じゃ ない に説明{せつめい}しました。