We're going to solve 1800 multiplied by 2421
1800 × 2421 = 2421 × (1800)
+ 2421 × 0 which equals 0
+ 2421 × 00 which equals 0
+ 2421 × 800 producing 1936800
+ 2421 × 1000 giving us 2421000

= 4357800
