diff -r 223c01e1a084 -r 58e70956523a .emacs-my
--- a/.emacs-my	Mon Mar 22 23:39:52 2010 +0200
+++ b/.emacs-my	Wed Mar 24 15:26:12 2010 +0200
@@ -511,6 +511,12 @@
 ;; chord-mode - edit guitar music
 ;; discography - variant of BibTeX mode for discographies
 
+;; ----------------------------------------------------------------------
+;; cacl, calculator.
+
+(setq-default calc-group-digits t)
+(setq-default calc-group-char "'")
+
 ;; ======================================================================
 ;; TeX, LaTeX.