Alright, let's work through 2240 times 7145 step by step
2240 × 7145 = 7145 × (2240)
+ 7145 × 0 what gives us 0
+ 7145 × 40 resulting in 285800
+ 7145 × 200 yielding 1429000
+ 7145 × 2000 giving us 14290000

= 16004800
