Alright, let's work through 4459 times 2143 step by step
4459 × 2143 = 2143 × (4459)
+ 2143 × 9 that equals 19287
+ 2143 × 50 producing 107150
+ 2143 × 400 resulting in 857200
+ 2143 × 4000 producing 8572000

= 9555637
