Alright, let's work through 9978 times 3992 step by step
9978 × 3992 = 3992 × (9978)
+ 3992 × 8 that results in 31936
+ 3992 × 70 that is equal 279440
+ 3992 × 900 giving us 3592800
+ 3992 × 9000 yielding 35928000

= 39832176
