Alright, let's work through 1621 times 5475 step by step
1621 × 5475 = 5475 × (1621)
+ 5475 × 1 that is equal 5475
+ 5475 × 20 resulting in 109500
+ 5475 × 600 yielding 3285000
+ 5475 × 1000 what gives us 5475000

= 8874975
