We're going to solve 9899 multiplied by 1345
9899 × 1345 = 1345 × (9899)
+ 1345 × 9 that equals 12105
+ 1345 × 90 giving us 121050
+ 1345 × 800 which equals 1076000
+ 1345 × 9000 producing 12105000

= 13314155
