We're going to solve 9881 multiplied by 1398
9881 × 1398 = 1398 × (9881)
+ 1398 × 1 that equals 1398
+ 1398 × 80 which equals 111840
+ 1398 × 800 that equals 1118400
+ 1398 × 9000 what gives us 12582000

= 13813638
