Alright, let's work through 9990 times 4063 step by step
9990 × 4063 = 4063 × (9990)
+ 4063 × 0 what gives us 0
+ 4063 × 90 that results in 365670
+ 4063 × 900 producing 3656700
+ 4063 × 9000 that is equal 36567000

= 40589370
