Alright, let's work through 5407 times 6403 step by step
5407 × 6403 = 6403 × (5407)
+ 6403 × 7 that results in 44821
+ 6403 × 00 resulting in 0
+ 6403 × 400 yielding 2561200
+ 6403 × 5000 producing 32015000

= 34621021
