No problem, we've got 3101 and 5123 to multiply
3101 × 5123 = 5123 × (3101)
+ 5123 × 1 which equals 5123
+ 5123 × 00 giving us 0
+ 5123 × 100 resulting in 512300
+ 5123 × 3000 producing 15369000

= 15886423
