Alright, let's work through 81802475 times 48437469 step by step
81802475 × 48437469 = 48437469 × (81802475)
+ 48437469 × 5 giving us 242187345
+ 48437469 × 70 resulting in 3390622830
+ 48437469 × 400 producing 19374987600
+ 48437469 × 2000 that results in 96874938000
+ 48437469 × 00000 resulting in 0
+ 48437469 × 800000 that results in 38749975200000
+ 48437469 × 1000000 resulting in 48437469000000
+ 48437469 × 80000000 that equals 3874997520000000

= 3962304846935775
