MOV R0, #LOW(500)
MOV R1, #HIGH(500)
MOV R2, #LOW(270)
MOV R3, #HIGH(270)

MOV A, R0
MOV B, R2
MUL AB
MOV R4, A
MOV R5, B

MOV  A, R0
MOV  B, R3
MUL AB
ADDC A, R5
MOV R5, A
MOV R6, B
MOV A, R1
MOV B,R2
MUL AB
ADDC A, R5
MOV R5, A
MOV A,B
ADDC A, R6
MOV R6, A
MOV A, R1
MOV B,R3
MUL AB
MOV R7,B
ADDC A, R6
MOV R6,A