Alright, let's work through 8006 times 3603 step by step
8006 × 3603 = 3603 × (8006)
+ 3603 × 6 which equals 21618
+ 3603 × 00 that equals 0
+ 3603 × 000 that is equal 0
+ 3603 × 8000 that results in 28824000

= 28845618
