Alright, let's work through 5028 times 4200 step by step
5028 × 4200 = 4200 × (5028)
+ 4200 × 8 which equals 33600
+ 4200 × 20 yielding 84000
+ 4200 × 000 that equals 0
+ 4200 × 5000 which equals 21000000

= 21117600
