Alright, let's work through 3659 times 5391 step by step
3659 × 5391 = 5391 × (3659)
+ 5391 × 9 giving us 48519
+ 5391 × 50 which equals 269550
+ 5391 × 600 resulting in 3234600
+ 5391 × 3000 that equals 16173000

= 19725669
