Alright, let's work through 3628 times 405 step by step
3628 × 405 = 405 × (3628)
+ 405 × 8 producing 3240
+ 405 × 20 yielding 8100
+ 405 × 600 that results in 243000
+ 405 × 3000 producing 1215000

= 1469340
