Alright, let's work through 2544 times 6400 step by step
2544 × 6400 = 6400 × (2544)
+ 6400 × 4 resulting in 25600
+ 6400 × 40 that is equal 256000
+ 6400 × 500 producing 3200000
+ 6400 × 2000 yielding 12800000

= 16281600
