No problem, we've got 4351 and 3631 to multiply
4351 × 3631 = 3631 × (4351)
+ 3631 × 1 which equals 3631
+ 3631 × 50 what gives us 181550
+ 3631 × 300 resulting in 1089300
+ 3631 × 4000 resulting in 14524000

= 15798481
