Alright, let's work through 1587 times 9902 step by step
1587 × 9902 = 9902 × (1587)
+ 9902 × 7 yielding 69314
+ 9902 × 80 yielding 792160
+ 9902 × 500 producing 4951000
+ 9902 × 1000 which equals 9902000

= 15714474
