Alright, let's work through 8641 times 4666 step by step
8641 × 4666 = 4666 × (8641)
+ 4666 × 1 resulting in 4666
+ 4666 × 40 that equals 186640
+ 4666 × 600 yielding 2799600
+ 4666 × 8000 that equals 37328000

= 40318906
