No problem, we've got 3942 and 2172 to multiply
3942 × 2172 = 2172 × (3942)
+ 2172 × 2 which equals 4344
+ 2172 × 40 which equals 86880
+ 2172 × 900 giving us 1954800
+ 2172 × 3000 producing 6516000

= 8562024
