Alright, let's work through 4215 times 1863 step by step
4215 × 1863 = 1863 × (4215)
+ 1863 × 5 that equals 9315
+ 1863 × 10 that results in 18630
+ 1863 × 200 which equals 372600
+ 1863 × 4000 that is equal 7452000

= 7852545
