Install the ARM software development toolkit $($Keil MDK version $4\mathrm{.}12)$

Write the following assembly code:

AREA Lab$1,$ CODE

ENTRY

MOV R$0,$ #$3$

MOV R$1,$ #$2$

ADD R$2,$ R$1,$ R$0$

END

Can you please help me print an output for this code, because i kept getting an error. Must be on Keil MDK version $4\mathrm{.}12$