`(c-u/ U1 U2) → (list list)`syntaxUnary division. Yields a list of two unary numbers, representing the quotient and the remainder of the division.

Given the second list has length

`N`, the quotient will contain every`N`th item from the first list, and the remainder will contain the tail of the first list. Division by zero (empty list) is a syntax error.(ck () (c-quote (c-u/ '(a b c d e f g h i j k) '(x y z)))) ;; ==> '((g d a) (j k)) ;; Because 11 / 3 = 3 with a remainder of 2.