Alright, let's work through 2287 times 2378 step by step
2287 × 2378 = 2378 × (2287)
+ 2378 × 7 giving us 16646
+ 2378 × 80 producing 190240
+ 2378 × 200 producing 475600
+ 2378 × 2000 that is equal 4756000

= 5438486
