Alright, let's work through 2170 times 6400 step by step
2170 × 6400 = 6400 × (2170)
+ 6400 × 0 that results in 0
+ 6400 × 70 that equals 448000
+ 6400 × 100 yielding 640000
+ 6400 × 2000 resulting in 12800000

= 13888000
