Alright, let's work through 4218 times 4090 step by step
4218 × 4090 = 4090 × (4218)
+ 4090 × 8 yielding 32720
+ 4090 × 10 producing 40900
+ 4090 × 200 producing 818000
+ 4090 × 4000 producing 16360000

= 17251620
