We're going to solve 3897 multiplied by 1340
3897 × 1340 = 1340 × (3897)
+ 1340 × 7 resulting in 9380
+ 1340 × 90 producing 120600
+ 1340 × 800 that is equal 1072000
+ 1340 × 3000 producing 4020000

= 5221980
