Alright, let's work through 8150 times 9987 step by step
8150 × 9987 = 9987 × (8150)
+ 9987 × 0 that results in 0
+ 9987 × 50 which equals 499350
+ 9987 × 100 producing 998700
+ 9987 × 8000 giving us 79896000

= 81394050
