Alright, let's work through 6428 times 4511 step by step
6428 × 4511 = 4511 × (6428)
+ 4511 × 8 that equals 36088
+ 4511 × 20 that is equal 90220
+ 4511 × 400 that is equal 1804400
+ 4511 × 6000 that results in 27066000

= 28996708
