Alright, let's work through 4009 times 8643 step by step
4009 × 8643 = 8643 × (4009)
+ 8643 × 9 that results in 77787
+ 8643 × 00 resulting in 0
+ 8643 × 000 resulting in 0
+ 8643 × 4000 resulting in 34572000

= 34649787
