Alright, let's work through 8487 times 1817 step by step
8487 × 1817 = 1817 × (8487)
+ 1817 × 7 yielding 12719
+ 1817 × 80 that equals 145360
+ 1817 × 400 giving us 726800
+ 1817 × 8000 producing 14536000

= 15420879
