Alright, let's work through 8393 times 2596 step by step
8393 × 2596 = 2596 × (8393)
+ 2596 × 3 that is equal 7788
+ 2596 × 90 producing 233640
+ 2596 × 300 that is equal 778800
+ 2596 × 8000 resulting in 20768000

= 21788228
