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  1. or download this
    use Math::BigFLoat;;

...

print $n;;                     ##### and display the (bigfloat) result
0.0000000000000032384626433832795
  2. or download this
        3.1415926535897932384626433832795
  - 3.1415926535897931000000000000000
    0.0000000000000001384626433832795 which is quite different to the 
+value from above!
    0.0000000000000032384626433832795