Alright, let's work through 5251 times 405 step by step
5251 × 405 = 405 × (5251)
+ 405 × 1 resulting in 405
+ 405 × 50 that is equal 20250
+ 405 × 200 that is equal 81000
+ 405 × 5000 what gives us 2025000

= 2126655
