Alright, let's work through 8506 times 8631 step by step
8506 × 8631 = 8631 × (8506)
+ 8631 × 6 producing 51786
+ 8631 × 00 that equals 0
+ 8631 × 500 producing 4315500
+ 8631 × 8000 producing 69048000

= 73415286
