Alright, let's work through 2471 times 8172 step by step
2471 × 8172 = 8172 × (2471)
+ 8172 × 1 yielding 8172
+ 8172 × 70 producing 572040
+ 8172 × 400 that equals 3268800
+ 8172 × 2000 what gives us 16344000

= 20193012
