Take a look at this expression:

(let ((x 1)
(y 2)
(z 3)
(v 5))
(cons x
(call/cc (lambda (e)
(cons y
(cons z
(if (even? v) v (e (+ v 1)))))))))

What is the value of the expression? [Needless to say: Figure it out without just putting it into your Scheme REPL.]

Play with it - and try out possible variations.

The same for:

(let ((x 1)
(y 2)
(z 3)
(v 5))
(+ x
(call/cc
(lambda (e)
(+ y
(+ z
(if (even? v) v (e (+ v 1)))))))))