Alright, let's work through 81350618 times 72597984 step by step
81350618 × 72597984 = 72597984 × (81350618)
+ 72597984 × 8 resulting in 580783872
+ 72597984 × 10 giving us 725979840
+ 72597984 × 600 producing 43558790400
+ 72597984 × 0000 that equals 0
+ 72597984 × 50000 yielding 3629899200000
+ 72597984 × 300000 yielding 21779395200000
+ 72597984 × 1000000 producing 72597984000000
+ 72597984 × 80000000 what gives us 5807838720000000

= 5905890863954112
