Alright, let's work through 80069593 times 81315475 step by step
80069593 × 81315475 = 81315475 × (80069593)
+ 81315475 × 3 giving us 243946425
+ 81315475 × 90 resulting in 7318392750
+ 81315475 × 500 that equals 40657737500
+ 81315475 × 9000 which equals 731839275000
+ 81315475 × 60000 giving us 4878928500000
+ 81315475 × 000000 producing 0
+ 81315475 × 0000000 giving us 0
+ 81315475 × 80000000 that results in 6505238000000000

= 6510896987851675
