We're going to solve 8120 multiplied by 6870
8120 × 6870 = 6870 × (8120)
+ 6870 × 0 that is equal 0
+ 6870 × 20 producing 137400
+ 6870 × 100 what gives us 687000
+ 6870 × 8000 what gives us 54960000

= 55784400
