We're going to solve 9870 multiplied by 2100
9870 × 2100 = 2100 × (9870)
+ 2100 × 0 producing 0
+ 2100 × 70 what gives us 147000
+ 2100 × 800 which equals 1680000
+ 2100 × 9000 which equals 18900000

= 20727000
