Alright, let's work through 8602 times 2561 step by step
8602 × 2561 = 2561 × (8602)
+ 2561 × 2 yielding 5122
+ 2561 × 00 which equals 0
+ 2561 × 600 that equals 1536600
+ 2561 × 8000 giving us 20488000

= 22029722
