What does this Assembly snippet output?

1.global _main
2.align 2
3_main:
4    stp x29, x30, [sp, #-32]!
5    mov w8, #0
6    mov w9, #6
7    mov w10, #7
8mul_loop:
9    cbz w10, mul_done
10    add w8, w8, w9
11    sub w10, w10, #1
12    b mul_loop
13mul_done:
14    sub sp, sp, #16
15    str x8, [sp]
16    adrp x0, fmt@PAGE
17    add x0, x0, fmt@PAGEOFF
18    bl _printf
19    add sp, sp, #16
20    ldp x29, x30, [sp], #32
21    mov w0, #0
22    ret
23.section __TEXT,__cstring
24fmt: .asciz "%d\n"