Alright, let's work through 9815 times 8358 step by step
9815 × 8358 = 8358 × (9815)
+ 8358 × 5 resulting in 41790
+ 8358 × 10 yielding 83580
+ 8358 × 800 producing 6686400
+ 8358 × 9000 producing 75222000

= 82033770
