Alright, let's work through 4819 times 4312 step by step
4819 × 4312 = 4312 × (4819)
+ 4312 × 9 yielding 38808
+ 4312 × 10 yielding 43120
+ 4312 × 800 resulting in 3449600
+ 4312 × 4000 producing 17248000

= 20779528
