Let's calculate 8210 x 8172
8210 × 8172 = 8172 × (8210)
+ 8172 × 0 what gives us 0
+ 8172 × 10 which equals 81720
+ 8172 × 200 that is equal 1634400
+ 8172 × 8000 that results in 65376000

= 67092120
