Alright, let's work through 8181 times 6375 step by step
8181 × 6375 = 6375 × (8181)
+ 6375 × 1 giving us 6375
+ 6375 × 80 that equals 510000
+ 6375 × 100 producing 637500
+ 6375 × 8000 resulting in 51000000

= 52153875
