Alright, let's work through 9984 times 1778 step by step
9984 × 1778 = 1778 × (9984)
+ 1778 × 4 what gives us 7112
+ 1778 × 80 giving us 142240
+ 1778 × 900 yielding 1600200
+ 1778 × 9000 which equals 16002000

= 17751552
