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eintr: Effect of installation

 
 The effect of installation
 --------------------------
 
 You can see the effect of installing ‘multiply-by-seven’ by evaluating
 the following sample.  Place the cursor after the following expression
 and type ‘C-x C-e’.  The number 21 will appear in the echo area.
 
      (multiply-by-seven 3)
 
    If you wish, you can read the documentation for the function by
 typing ‘C-h f’ (‘describe-function’) and then the name of the function,
 ‘multiply-by-seven’.  When you do this, a ‘*Help*’ window will appear on
 your screen that says:
 
      multiply-by-seven is a Lisp function.
 
      (multiply-by-seven NUMBER)
 
      Multiply NUMBER by seven.
 
 (To return to a single window on your screen, type ‘C-x 1’.)
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