.ORIG x4000
	; multiplies two non-zero numbers x and y, stored in registers R0 (stores x), and R1 (stores y) and 
	; returns result (x*y) in R7
	
mult		AND R7, R7, #0	;initialize R7 =0

		; can you insert code here to check if either of the numbers is zero (in which case product is zero)

loopmult	ADD R7, R7, R1	; add R1 to itself R0 times and store result in R7- add y to itself x times
		ADD R0, R0, #-1	;decrement R0
		BRp loopmult
done		HALT
		.END