[Batch Tool] DEC & HEX Converter

@echo off
set blank= >>nul
:Reboot
title DEC ^& HEX Converter
:ChoiceField1
cls
echo Choice: [Use W and S to move and X to select, Q to leave]
echo ^<-- Convert from HEX to DEC --^>
echo  -- Convert from DEC to HEX --
echo.
choice /n /c:wsxq
if errorlevel 1 if not errorlevel 2 goto ChoiceField2
if errorlevel 2 if not errorlevel 3 goto ChoiceField2
if errorlevel 3 if not errorlevel 4 goto ConvHEXToDEC
if errorlevel 4 if not errorlevel 5 Exit
:ChoiceField2
cls
echo Choice: [Use W and S to move and X to select, Q to leave]
echo  -- Convert from HEX to DEC --
echo ^<-- Convert from DEC to HEX --^>
echo.
choice /n /c:wsxq
if errorlevel 1 if not errorlevel 2 goto ChoiceField1
if errorlevel 2 if not errorlevel 3 goto ChoiceField1
if errorlevel 3 if not errorlevel 4 goto ConvDECToHEX
if errorlevel 4 if not errorlevel 5 Exit
:ConvHEXToDEC
title Convert from HEX to DEC
cls
echo Enter the HEX to convert to DEC
echo.
set /p HEX=HEX:%blank%
if "%HEX%"=="" goto ConvHEXToDEC
set /a DEC=0x%HEX%
call cmd /c exit /b %DEC%
set HEX=%=exitcode%
SET HEXa=!HEX:~-2!
SET HEXb=!HEX:~-4,-2!
SET HEXc=!HEX:~-6,-4!
set  HEXd=!HEX:~-8,-6!
set xeh=!HEXa!!HEXb!HEXc!!HEXd!
cls
echo Your Input: %HEX% (HEX)
echo Your  Output: %DEC% (DEC)
echo.
pause>>nul
goto Reboot
:ConvDECToHEX
title Convert from DEC to HEX
cls
echo Enter the DEC to Convert to HEX.
echo.
set /p DEC=DEC:%blank%
if "%DEC%"=="" goto NoInput
cls
call cmd /c exit /b %DEC%
set HEX=%=exitcode%
cls
echo Your Input: %DEC% (DEC)
echo The  Output: %HEX% (HEX)
echo.
pause>>nul
goto Reboot