Alright, let's work through 4390 times 6864 step by step
4390 × 6864 = 6864 × (4390)
+ 6864 × 0 yielding 0
+ 6864 × 90 that results in 617760
+ 6864 × 300 resulting in 2059200
+ 6864 × 4000 giving us 27456000

= 30132960
