Alright, let's work through 8443 times 421 step by step
8443 × 421 = 421 × (8443)
+ 421 × 3 that results in 1263
+ 421 × 40 yielding 16840
+ 421 × 400 what gives us 168400
+ 421 × 8000 yielding 3368000

= 3554503
