No problem, we've got 2178 and 9120 to multiply
2178 × 9120 = 9120 × (2178)
+ 9120 × 8 which equals 72960
+ 9120 × 70 yielding 638400
+ 9120 × 100 producing 912000
+ 9120 × 2000 giving us 18240000

= 19863360
