gistfile1.txt

    @R2     // A = 2
    M=0     // Memory[2] = 0
(LOOP)
    @R1     // A = 1
    M=M-1   // Memory[1] = Memory[1] - 1
    D=M     // D = Memory[1]
    @END
    D;JLT   // Jump to @END if D < 0
    @R0     // A = 0
    D=M     // D = Memory[0]
    @R2     // A = 2
    M=D+M   // Memory[2] = D + Memory[2]
    @LOOP   // Loop
    0;JMP
(END)
    @END
    0;JMP

heh this is what it would look like in redscript:

multiply:  // result = r0 * r1
    result = 0
loop:
    r1 -= 1
    if r1 < 0:
        jmp end
    result += r0
    jmp loop

r0: .data 0
r1: .data 0
result: .data 0

end: nop