Alright, let's work through 2478 times 8127 step by step
2478 × 8127 = 8127 × (2478)
+ 8127 × 8 producing 65016
+ 8127 × 70 resulting in 568890
+ 8127 × 400 resulting in 3250800
+ 8127 × 2000 resulting in 16254000

= 20138706
