Alright, let's work through 1647 times 8398 step by step
1647 × 8398 = 8398 × (1647)
+ 8398 × 7 producing 58786
+ 8398 × 40 that equals 335920
+ 8398 × 600 which equals 5038800
+ 8398 × 1000 resulting in 8398000

= 13831506
