We're going to solve 3865 multiplied by 3189
3865 × 3189 = 3189 × (3865)
+ 3189 × 5 what gives us 15945
+ 3189 × 60 that results in 191340
+ 3189 × 800 what gives us 2551200
+ 3189 × 3000 yielding 9567000

= 12325485
