Alright, let's work through 5408 times 1198 step by step
5408 × 1198 = 1198 × (5408)
+ 1198 × 8 yielding 9584
+ 1198 × 00 producing 0
+ 1198 × 400 producing 479200
+ 1198 × 5000 that results in 5990000

= 6478784
