Alright, let's work through 6433 times 5445 step by step
6433 × 5445 = 5445 × (6433)
+ 5445 × 3 that equals 16335
+ 5445 × 30 producing 163350
+ 5445 × 400 yielding 2178000
+ 5445 × 6000 which equals 32670000

= 35027685
