Alright, let's work through 8518 times 9831 step by step
8518 × 9831 = 9831 × (8518)
+ 9831 × 8 that is equal 78648
+ 9831 × 10 what gives us 98310
+ 9831 × 500 yielding 4915500
+ 9831 × 8000 producing 78648000

= 83740458
