Alright, let's work through 2107 times 9120 step by step
2107 × 9120 = 9120 × (2107)
+ 9120 × 7 producing 63840
+ 9120 × 00 resulting in 0
+ 9120 × 100 giving us 912000
+ 9120 × 2000 that results in 18240000

= 19215840
