Alright, let's work through 6378 times 3543 step by step
6378 × 3543 = 3543 × (6378)
+ 3543 × 8 that equals 28344
+ 3543 × 70 that results in 248010
+ 3543 × 300 resulting in 1062900
+ 3543 × 6000 yielding 21258000

= 22597254
