Alright, let's work through 3680 times 1066 step by step
3680 × 1066 = 1066 × (3680)
+ 1066 × 0 resulting in 0
+ 1066 × 80 that results in 85280
+ 1066 × 600 that equals 639600
+ 1066 × 3000 producing 3198000

= 3922880
