Alright, let's work through 9086 times 8704 step by step
9086 × 8704 = 8704 × (9086)
+ 8704 × 6 producing 52224
+ 8704 × 80 that is equal 696320
+ 8704 × 000 that equals 0
+ 8704 × 9000 giving us 78336000

= 79084544
