Alright, let's work through 9988 times 5040 step by step
9988 × 5040 = 5040 × (9988)
+ 5040 × 8 producing 40320
+ 5040 × 80 that is equal 403200
+ 5040 × 900 that is equal 4536000
+ 5040 × 9000 resulting in 45360000

= 50339520
