No problem, we've got 4723 and 3979 to multiply
4723 × 3979 = 3979 × (4723)
+ 3979 × 3 what gives us 11937
+ 3979 × 20 giving us 79580
+ 3979 × 700 resulting in 2785300
+ 3979 × 4000 giving us 15916000

= 18792817
