DB<137> $x1 = (1.15*170)+0.50;

  DB<138> p "$x1"
196
  DB<139> p $x1
196
  DB<140> printf "%.20f\n",$x1
195.99999999999997000000

  DB<141> $str = $x1.""

  DB<142> p length $str
3
  DB<143>

##</code><code>##

  DB<151> $x2 = (1.15*170)+0.50;

  DB<152> Dump $x2
SV = NV(0x32cc698) at 0x32cc6b0
  REFCNT = 1
  FLAGS = (NOK,pNOK)
  NV = 196

  DB<153> p $x2
196
  DB<154> Dump $x2
SV = PVNV(0x1cb938) at 0x32cc6b0
  REFCNT = 1
  FLAGS = (NOK,pNOK)
  IV = 0
  NV = 196
  PV = 0x31a4748 "196"\0
  CUR = 3
  LEN = 32