Alright, let's work through 80679581 times 97457287 step by step
80679581 × 97457287 = 97457287 × (80679581)
+ 97457287 × 1 producing 97457287
+ 97457287 × 80 yielding 7796582960
+ 97457287 × 500 yielding 48728643500
+ 97457287 × 9000 that equals 877115583000
+ 97457287 × 70000 that equals 6822010090000
+ 97457287 × 600000 what gives us 58474372200000
+ 97457287 × 0000000 that results in 0
+ 97457287 × 80000000 yielding 7796582960000000

= 7862813080556747
