Multiplying 2 numbers with 16 bit answer

; program to add 2 numbers whose answer is 16 bit
ORG 0H;
MOV A, #00H ;
MOV R0,#13H
MOV R1, #00H
AGAIN: ADD A, #12H;
       JC INCREMENT ; 
       DJNZ R0,AGAIN;
INCREMENT: INC R1 ;
           SJMP AGAIN;
END