Alright, let's work through 1851 times 2459 step by step
1851 × 2459 = 2459 × (1851)
+ 2459 × 1 that is equal 2459
+ 2459 × 50 yielding 122950
+ 2459 × 800 that results in 1967200
+ 2459 × 1000 producing 2459000

= 4551609
