Multiplying 2 numbers in assembly

multi2.asm

global _start

section .text

_start:
  ; multiply two numbers

  ; we are going to have a loop that lets us loop the amount of times 
  ;that we want to multiply it
  mov r8, 0
  mov r9, 5
  mov r10, 6
  
  loop:
  add r8, r10
  sub r9, 1
  cmp r9, 0
  jne loop
 
  mov rax, 60       
  mov rdi, r8        
  syscall