What does this Assembly snippet output?

1.global _main
2.align 2
3_main:
4    stp x29, x30, [sp, #-48]!
5    mov w8, #1000
6    mov w9, #2000
7    str w8, [sp, #16]
8    str w9, [sp, #20]
9    ldr w10, [sp, #16]
10    ldr w11, [sp, #20]
11    add w10, w10, w11
12    sub sp, sp, #16
13    str x10, [sp]
14    adrp x0, fmt@PAGE
15    add x0, x0, fmt@PAGEOFF
16    bl _printf
17    add sp, sp, #16
18    ldp x29, x30, [sp], #48
19    mov w0, #0
20    ret
21.section __TEXT,__cstring
22fmt: .asciz "%d\n"