This script multiplies 2 with 2 and at the end will output the result. (tbh this is just to show off as you can multiply using the 'mul' instruction)

The first 2 lines controls what gets multiplied with what, you can change the values to whatever value you want, though it requires some changes to the first two lines if you want to put in a number greater than 127.

mov 2 r0
mov 2 r1
jmp_eq r2 r1 24
    add r3 r0 r3
    add r2 1 r2
jmp 8
mov r3 rout
hlt