Alright, let's work through 8427 times 2077 step by step
8427 × 2077 = 2077 × (8427)
+ 2077 × 7 which equals 14539
+ 2077 × 20 that is equal 41540
+ 2077 × 400 that is equal 830800
+ 2077 × 8000 producing 16616000

= 17502879
