Let's calculate 8364 x 8260
8364 × 8260 = 8260 × (8364)
+ 8260 × 4 that is equal 33040
+ 8260 × 60 that results in 495600
+ 8260 × 300 what gives us 2478000
+ 8260 × 8000 that is equal 66080000

= 69086640
