title: Multiply two lists in Racket
body: <p>I am using Racket to multiply to list with the same length. So far I have tried:</p>
  
  <pre><code>(define (multiply-list a b)
    (if ([(empty? a) (empty)])
        else (cons(*car(a)car(b)))
        cdr(a) cdr(b)))                  
  </code></pre>
  
  <p>I am having trouble understanding the syntax of Racket. I want to update the list to it's <code>cdr</code>. but I cannot get it right <code>a</code> and <code>b</code> are the lists.</p>