Alright, let's work through 80842909 times 91602264 step by step
80842909 × 91602264 = 91602264 × (80842909)
+ 91602264 × 9 which equals 824420376
+ 91602264 × 00 that results in 0
+ 91602264 × 900 producing 82442037600
+ 91602264 × 2000 giving us 183204528000
+ 91602264 × 40000 which equals 3664090560000
+ 91602264 × 800000 that equals 73281811200000
+ 91602264 × 0000000 giving us 0
+ 91602264 × 80000000 which equals 7328181120000000

= 7405393492745976
