Alright, let's work through 8345 times 9729 step by step
8345 × 9729 = 9729 × (8345)
+ 9729 × 5 that equals 48645
+ 9729 × 40 what gives us 389160
+ 9729 × 300 that equals 2918700
+ 9729 × 8000 producing 77832000

= 81188505
