We're going to solve 3903 multiplied by 4391
3903 × 4391 = 4391 × (3903)
+ 4391 × 3 producing 13173
+ 4391 × 00 producing 0
+ 4391 × 900 what gives us 3951900
+ 4391 × 3000 which equals 13173000

= 17138073
