We're going to solve 1857 multiplied by 3980
1857 × 3980 = 3980 × (1857)
+ 3980 × 7 resulting in 27860
+ 3980 × 50 producing 199000
+ 3980 × 800 that is equal 3184000
+ 3980 × 1000 yielding 3980000

= 7390860
