Alright, let's work through 8641 times 1646 step by step
8641 × 1646 = 1646 × (8641)
+ 1646 × 1 what gives us 1646
+ 1646 × 40 resulting in 65840
+ 1646 × 600 what gives us 987600
+ 1646 × 8000 resulting in 13168000

= 14223086
