Is it because answer to every question is 42?

The number 42 is the answer to life, the universe and everything from The Hitchhiker’s Guide to the Galaxy.

May be stylized 6 and 9 are not numbers at all but represent something else. 6×9 =42 in some different base numbers.

OK, I got it; from the Restaurant at the End of the Universe book:

Arthur pulls random letters from a bag, but only gets the sentence “WHAT DO YOU GET IF YOU MULTIPLY SIX BY NINE?”

“ “Six by nine. Forty two.”

“That’s it. That’s all there is.”

“I always thought something was fundamentally wrong with the universe

Source

Sometimes I do think that there is something fundamentally wrong with the Universe.