No problem, we've got 9989 and 520 to multiply
9989 × 520 = 520 × (9989)
+ 520 × 9 which equals 4680
+ 520 × 80 that is equal 41600
+ 520 × 900 producing 468000
+ 520 × 9000 that results in 4680000

= 5194280
