Alright, let's work through 1987 times 9924 step by step
1987 × 9924 = 9924 × (1987)
+ 9924 × 7 which equals 69468
+ 9924 × 80 producing 793920
+ 9924 × 900 that equals 8931600
+ 9924 × 1000 giving us 9924000

= 19718988
