Alright, let's work through 2604 times 8051 step by step
2604 × 8051 = 8051 × (2604)
+ 8051 × 4 giving us 32204
+ 8051 × 00 yielding 0
+ 8051 × 600 producing 4830600
+ 8051 × 2000 which equals 16102000

= 20964804
