Alright, let's work through 80941739 times 80940764 step by step
80941739 × 80940764 = 80940764 × (80941739)
+ 80940764 × 9 producing 728466876
+ 80940764 × 30 producing 2428222920
+ 80940764 × 700 which equals 56658534800
+ 80940764 × 1000 resulting in 80940764000
+ 80940764 × 40000 that is equal 3237630560000
+ 80940764 × 900000 that results in 72846687600000
+ 80940764 × 0000000 what gives us 0
+ 80940764 × 80000000 producing 6475261120000000

= 6551486194148596
