Alright, let's work through 3615 times 5161 step by step
3615 × 5161 = 5161 × (3615)
+ 5161 × 5 that results in 25805
+ 5161 × 10 that results in 51610
+ 5161 × 600 giving us 3096600
+ 5161 × 3000 yielding 15483000

= 18657015
