Alright, let's work through 2427 times 8403 step by step
2427 × 8403 = 8403 × (2427)
+ 8403 × 7 that results in 58821
+ 8403 × 20 which equals 168060
+ 8403 × 400 yielding 3361200
+ 8403 × 2000 what gives us 16806000

= 20394081
