Alright, let's work through 3631 times 6428 step by step
3631 × 6428 = 6428 × (3631)
+ 6428 × 1 giving us 6428
+ 6428 × 30 that is equal 192840
+ 6428 × 600 resulting in 3856800
+ 6428 × 3000 giving us 19284000

= 23340068
