Alright, let's work through 2140 times 9992 step by step
2140 × 9992 = 9992 × (2140)
+ 9992 × 0 that is equal 0
+ 9992 × 40 yielding 399680
+ 9992 × 100 resulting in 999200
+ 9992 × 2000 giving us 19984000

= 21382880
