Alright, let's work through 9990 times 4908 step by step
9990 × 4908 = 4908 × (9990)
+ 4908 × 0 that equals 0
+ 4908 × 90 which equals 441720
+ 4908 × 900 that equals 4417200
+ 4908 × 9000 that is equal 44172000

= 49030920
