Alright, let's work through 8400 times 6570 step by step
8400 × 6570 = 6570 × (8400)
+ 6570 × 0 that is equal 0
+ 6570 × 00 that equals 0
+ 6570 × 400 yielding 2628000
+ 6570 × 8000 that results in 52560000

= 55188000
