Alright, let's work through 4820 times 1389 step by step
4820 × 1389 = 1389 × (4820)
+ 1389 × 0 resulting in 0
+ 1389 × 20 yielding 27780
+ 1389 × 800 giving us 1111200
+ 1389 × 4000 yielding 5556000

= 6694980
