Alright, let's work through 9990288 times 9798360 step by step
9990288 × 9798360 = 9798360 × (9990288)
+ 9798360 × 8 that results in 78386880
+ 9798360 × 80 that is equal 783868800
+ 9798360 × 200 that results in 1959672000
+ 9798360 × 0000 giving us 0
+ 9798360 × 90000 that equals 881852400000
+ 9798360 × 900000 yielding 8818524000000
+ 9798360 × 9000000 that equals 88185240000000

= 97888438327680
