Alright, let's work through 8139 times 2981 step by step
8139 × 2981 = 2981 × (8139)
+ 2981 × 9 giving us 26829
+ 2981 × 30 that is equal 89430
+ 2981 × 100 giving us 298100
+ 2981 × 8000 that equals 23848000

= 24262359
