Alright, let's work through 4197 times 5028 step by step
4197 × 5028 = 5028 × (4197)
+ 5028 × 7 producing 35196
+ 5028 × 90 which equals 452520
+ 5028 × 100 what gives us 502800
+ 5028 × 4000 that results in 20112000

= 21102516
