Alright, let's work through 81515778 times 37021504 step by step
81515778 × 37021504 = 37021504 × (81515778)
+ 37021504 × 8 producing 296172032
+ 37021504 × 70 that results in 2591505280
+ 37021504 × 700 that results in 25915052800
+ 37021504 × 5000 giving us 185107520000
+ 37021504 × 10000 which equals 370215040000
+ 37021504 × 500000 that results in 18510752000000
+ 37021504 × 1000000 that results in 37021504000000
+ 37021504 × 80000000 resulting in 2961720320000000

= 3017836701290112
