Alright, let's work through 3664 times 7620 step by step
3664 × 7620 = 7620 × (3664)
+ 7620 × 4 giving us 30480
+ 7620 × 60 resulting in 457200
+ 7620 × 600 which equals 4572000
+ 7620 × 3000 resulting in 22860000

= 27919680
