Alright, let's work through 8729 times 2158 step by step
8729 × 2158 = 2158 × (8729)
+ 2158 × 9 producing 19422
+ 2158 × 20 that is equal 43160
+ 2158 × 700 which equals 1510600
+ 2158 × 8000 what gives us 17264000

= 18837182
