Alright, let's work through 3658 times 5509 step by step
3658 × 5509 = 5509 × (3658)
+ 5509 × 8 resulting in 44072
+ 5509 × 50 resulting in 275450
+ 5509 × 600 resulting in 3305400
+ 5509 × 3000 what gives us 16527000

= 20151922
