We're going to solve 3643 multiplied by 4223
3643 × 4223 = 4223 × (3643)
+ 4223 × 3 yielding 12669
+ 4223 × 40 that results in 168920
+ 4223 × 600 resulting in 2533800
+ 4223 × 3000 that results in 12669000

= 15384389
