Alright, let's work through 4540 times 1273 step by step
4540 × 1273 = 1273 × (4540)
+ 1273 × 0 giving us 0
+ 1273 × 40 yielding 50920
+ 1273 × 500 that is equal 636500
+ 1273 × 4000 yielding 5092000

= 5779420
