We're going to solve 2103 multiplied by 1828
2103 × 1828 = 1828 × (2103)
+ 1828 × 3 giving us 5484
+ 1828 × 00 which equals 0
+ 1828 × 100 giving us 182800
+ 1828 × 2000 resulting in 3656000

= 3844284
