Alright, let's work through 4160 times 3657 step by step
4160 × 3657 = 3657 × (4160)
+ 3657 × 0 yielding 0
+ 3657 × 60 that results in 219420
+ 3657 × 100 what gives us 365700
+ 3657 × 4000 that results in 14628000

= 15213120
