D:\>perl -MDevel::Peek -MMath::BigFloat -le "$x = Math::BigFloat->new(20); $x += 100; print $x; Dump $x;"
42
SV = PVIV(0x1bc99137430) at 0x1bc9913a450
  REFCNT = 1
  FLAGS = (IOK,pIOK,pPOK)
  IV = 42
  PV = 0x1bc9b44fbe0 "42"\0
  CUR = 2
  LEN = 16