Alright, let's work through 81576301 times 68357538 step by step
81576301 × 68357538 = 68357538 × (81576301)
+ 68357538 × 1 that results in 68357538
+ 68357538 × 00 that results in 0
+ 68357538 × 300 yielding 20507261400
+ 68357538 × 6000 that is equal 410145228000
+ 68357538 × 70000 producing 4785027660000
+ 68357538 × 500000 yielding 34178769000000
+ 68357538 × 1000000 which equals 68357538000000
+ 68357538 × 80000000 that results in 5468603040000000

= 5576355095506938
