Alright, let's work through 9818 times 3991 step by step
9818 × 3991 = 3991 × (9818)
+ 3991 × 8 that is equal 31928
+ 3991 × 10 that results in 39910
+ 3991 × 800 that equals 3192800
+ 3991 × 9000 that is equal 35919000

= 39183638
