Alright, let's work through 1428 times 8570 step by step
1428 × 8570 = 8570 × (1428)
+ 8570 × 8 producing 68560
+ 8570 × 20 that equals 171400
+ 8570 × 400 that results in 3428000
+ 8570 × 1000 yielding 8570000

= 12237960
