Whats up with KCalc?

[Nikolas Britton]

Umm help me out...

KCalc says:
44 + 1 = 45 and that:
45 + 1 = 46.00000000000000710542735760100185871124

Last time I checked 45 + 1 = 46, but I haven't kept my math skills up
to date so I could be wrong. I'm trying to check the math for a probe
I'm sending to a planet in the alpha centauri system, It would suck if
it got all the way to alpha centauri but missed the planet. ;-)

CPU: P4 2.26Ghz 512KB L2-Cache, 533MHz FSB, mPGA478
Mainboard: Intel D845GBV Desktop Board
PROD. CODE: BX80532PE2266D
sSpec: SL7V9
FPO/BATCH: 3440A751
VERSION: C81358-001

KCalc 1.8.1 (Using KDE 3.4.1) "built with 96bit (long double)
precision", what ever that means.

spectra# head /var/log/dmesg.today
Copyright (c) 1992-2005 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.4-STABLE #0: Mon Jun 27 21:21:22 CDT 2005
    nbritton at spectra.intranet:/usr/obj/usr/src/sys/SPECTRA
ACPI APIC Table: <INTEL  D845GBV >
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 2.26GHz (2266.76-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf25  Stepping = 5
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>