Let's calculate 9988 x 1010
9988 × 1010 = 1010 × (9988)
+ 1010 × 8 that results in 8080
+ 1010 × 80 that equals 80800
+ 1010 × 900 that results in 909000
+ 1010 × 9000 that is equal 9090000

= 10087880
