We're going to solve 9091 multiplied by 8900
9091 × 8900 = 8900 × (9091)
+ 8900 × 1 resulting in 8900
+ 8900 × 90 producing 801000
+ 8900 × 000 that is equal 0
+ 8900 × 9000 yielding 80100000

= 80909900
