Alright, let's work through 8672 times 1398 step by step
8672 × 1398 = 1398 × (8672)
+ 1398 × 2 producing 2796
+ 1398 × 70 producing 97860
+ 1398 × 600 resulting in 838800
+ 1398 × 8000 that is equal 11184000

= 12123456
