Alright, let's work through 8510 times 9791 step by step
8510 × 9791 = 9791 × (8510)
+ 9791 × 0 that is equal 0
+ 9791 × 10 that results in 97910
+ 9791 × 500 resulting in 4895500
+ 9791 × 8000 giving us 78328000

= 83321410
