Alright, let's work through 4488 times 4215 step by step
4488 × 4215 = 4215 × (4488)
+ 4215 × 8 that is equal 33720
+ 4215 × 80 yielding 337200
+ 4215 × 400 resulting in 1686000
+ 4215 × 4000 which equals 16860000

= 18916920
