Alright, let's work through 4165 times 3658 step by step
4165 × 3658 = 3658 × (4165)
+ 3658 × 5 that equals 18290
+ 3658 × 60 yielding 219480
+ 3658 × 100 that equals 365800
+ 3658 × 4000 that is equal 14632000

= 15235570
