No problem, we've got 1881 and 3989 to multiply
1881 × 3989 = 3989 × (1881)
+ 3989 × 1 resulting in 3989
+ 3989 × 80 which equals 319120
+ 3989 × 800 producing 3191200
+ 3989 × 1000 producing 3989000

= 7503309
