Alright, let's work through 4240 times 1509 step by step
4240 × 1509 = 1509 × (4240)
+ 1509 × 0 yielding 0
+ 1509 × 40 that equals 60360
+ 1509 × 200 resulting in 301800
+ 1509 × 4000 producing 6036000

= 6398160
