Alright, let's work through 6443 times 1632 step by step
6443 × 1632 = 1632 × (6443)
+ 1632 × 3 that equals 4896
+ 1632 × 40 giving us 65280
+ 1632 × 400 giving us 652800
+ 1632 × 6000 producing 9792000

= 10514976
