Alright, let's work through 3399 times 2544 step by step
3399 × 2544 = 2544 × (3399)
+ 2544 × 9 that equals 22896
+ 2544 × 90 giving us 228960
+ 2544 × 300 that equals 763200
+ 2544 × 3000 yielding 7632000

= 8647056
