Alright, let's work through 6428 times 3312 step by step
6428 × 3312 = 3312 × (6428)
+ 3312 × 8 that results in 26496
+ 3312 × 20 yielding 66240
+ 3312 × 400 what gives us 1324800
+ 3312 × 6000 that is equal 19872000

= 21289536
