Alright, let's work through 5645 times 3505 step by step
5645 × 3505 = 3505 × (5645)
+ 3505 × 5 which equals 17525
+ 3505 × 40 that results in 140200
+ 3505 × 600 yielding 2103000
+ 3505 × 5000 resulting in 17525000

= 19785725
