Alright, let's work through 1998 times 9447 step by step
1998 × 9447 = 9447 × (1998)
+ 9447 × 8 producing 75576
+ 9447 × 90 that results in 850230
+ 9447 × 900 yielding 8502300
+ 9447 × 1000 that results in 9447000

= 18875106
