We're going to solve 3399 multiplied by 6111
3399 × 6111 = 6111 × (3399)
+ 6111 × 9 yielding 54999
+ 6111 × 90 that results in 549990
+ 6111 × 300 giving us 1833300
+ 6111 × 3000 which equals 18333000

= 20771289
