We're going to solve 9870 multiplied by 1390
9870 × 1390 = 1390 × (9870)
+ 1390 × 0 resulting in 0
+ 1390 × 70 giving us 97300
+ 1390 × 800 what gives us 1112000
+ 1390 × 9000 that results in 12510000

= 13719300
