Alright, let's work through 8239 times 8389 step by step
8239 × 8389 = 8389 × (8239)
+ 8389 × 9 resulting in 75501
+ 8389 × 30 giving us 251670
+ 8389 × 200 that is equal 1677800
+ 8389 × 8000 that results in 67112000

= 69116971
