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  1. or download this
    use strict;
    use warnings;
    ...
      FLAGS = (PADBUSY,PADMY,IOK,pIOK)
      IV = 5
    calling foo(3): 3 * 4 = 18
    
  2. or download this
    use strict;
    use warnings;
    ...
    calling foo():  1 * 2 = 2
    calling bar(5): 3 * 5 = 15
    calling foo(3): 3 * 4 = 12
    
  3. or download this
    use strict;
    use warnings;
    ...
    calling foo():  1 * 2 = 2
    calling bar(5): 3 * 5 = 15
    calling foo(3): 3 * 4 = 12