Alright, let's work through 4285 times 287 step by step
4285 × 287 = 287 × (4285)
+ 287 × 5 producing 1435
+ 287 × 80 that equals 22960
+ 287 × 200 that equals 57400
+ 287 × 4000 that equals 1148000

= 1229795
