Alright, let's work through 6616 times 3109 step by step
6616 × 3109 = 3109 × (6616)
+ 3109 × 6 producing 18654
+ 3109 × 10 which equals 31090
+ 3109 × 600 giving us 1865400
+ 3109 × 6000 that equals 18654000

= 20569144
