Alright, let's work through 8329 times 9720 step by step
8329 × 9720 = 9720 × (8329)
+ 9720 × 9 resulting in 87480
+ 9720 × 20 resulting in 194400
+ 9720 × 300 which equals 2916000
+ 9720 × 8000 what gives us 77760000

= 80957880
