Let's calculate 8665 x 8120
8665 × 8120 = 8120 × (8665)
+ 8120 × 5 resulting in 40600
+ 8120 × 60 that is equal 487200
+ 8120 × 600 that is equal 4872000
+ 8120 × 8000 which equals 64960000

= 70359800
