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  DB<17> p 0x05/0x10
0.3125

  DB<18> p int(0x05/0x10)
0

  DB<25> p int(0x05/"\x10")
Illegal division by zero at (eval 33)[C:/Perl_64/lib/perl5db.pl:646] l
+ine 2.

  DB<31> p "05"/"16" # strings with decimal(!) numbers
0.3125

  DB<27> p ord("\x10")
16

  DB<28> p "\x10"
&#9658;                           # not a number, hence 0

  DB<1> p ord("1")
49
...

  DB<4> p 5 / "\x31\x36"      # string = "16" looks like number
 0.3125