Alright, let's work through 5051 times 879 step by step
5051 × 879 = 879 × (5051)
+ 879 × 1 that results in 879
+ 879 × 50 yielding 43950
+ 879 × 000 that equals 0
+ 879 × 5000 that is equal 4395000

= 4439829
