Alright, let's work through 8639 times 6244 step by step
8639 × 6244 = 6244 × (8639)
+ 6244 × 9 which equals 56196
+ 6244 × 30 resulting in 187320
+ 6244 × 600 which equals 3746400
+ 6244 × 8000 producing 49952000

= 53941916
