Alright, let's work through 8602 times 2060 step by step
8602 × 2060 = 2060 × (8602)
+ 2060 × 2 giving us 4120
+ 2060 × 00 which equals 0
+ 2060 × 600 which equals 1236000
+ 2060 × 8000 that is equal 16480000

= 17720120
