No problem, we've got 9981 and 1520 to multiply
9981 × 1520 = 1520 × (9981)
+ 1520 × 1 that equals 1520
+ 1520 × 80 giving us 121600
+ 1520 × 900 which equals 1368000
+ 1520 × 9000 that is equal 13680000

= 15171120
