We're going to solve 9921 multiplied by 2405
9921 × 2405 = 2405 × (9921)
+ 2405 × 1 what gives us 2405
+ 2405 × 20 resulting in 48100
+ 2405 × 900 that results in 2164500
+ 2405 × 9000 that is equal 21645000

= 23860005
