[racket] Generating Tuples from List

Again, trying to mimic something available in Mathematica (Tuples - Wolfram
Mathematica 8 Documentation http://bit.ly/AgsIym).
How can this be accomplished in Racket? Here's an example from the
Mathematica documentation.
All possible 3-tuples of  and :
In[1]:= <http://reference.wolfram.com/mathematica/ref/Tuples.html>
[image: Click for copyable
input]<http://reference.wolfram.com/mathematica/ref/Tuples.html>
Out[1]=
No, this is not homework. So, would appreciate code if available.

Thanks,

  % ashok
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