Alright, let's work through 81759807 times 68404823 step by step
81759807 × 68404823 = 68404823 × (81759807)
+ 68404823 × 7 that equals 478833761
+ 68404823 × 00 yielding 0
+ 68404823 × 800 giving us 54723858400
+ 68404823 × 9000 which equals 615643407000
+ 68404823 × 50000 yielding 3420241150000
+ 68404823 × 700000 yielding 47883376100000
+ 68404823 × 1000000 that is equal 68404823000000
+ 68404823 × 80000000 yielding 5472385840000000

= 5592765126349161
