No problem, we've got 7647 and 2861 to multiply
7647 × 2861 = 2861 × (7647)
+ 2861 × 7 that equals 20027
+ 2861 × 40 what gives us 114440
+ 2861 × 600 giving us 1716600
+ 2861 × 7000 yielding 20027000

= 21878067
