$ perl -MDevel::Peek -e 'Dump "0.08"; Dump 0.08'
SV = PV(0x80306c) at 0x800cc0
  REFCNT = 1
  FLAGS = (POK,READONLY,pPOK)
  PV = 0x205700 "0.08"\0
  CUR = 4
  LEN = 8
SV = NV(0x812e00) at 0x800c6c
  REFCNT = 1
  FLAGS = (NOK,READONLY,pNOK)
  NV = 0.08