Alright, let's work through 8839 times 3501 step by step
8839 × 3501 = 3501 × (8839)
+ 3501 × 9 giving us 31509
+ 3501 × 30 resulting in 105030
+ 3501 × 800 giving us 2800800
+ 3501 × 8000 that results in 28008000

= 30945339
