Alright, let's work through 81743769 times 66392442 step by step
81743769 × 66392442 = 66392442 × (81743769)
+ 66392442 × 9 resulting in 597531978
+ 66392442 × 60 which equals 3983546520
+ 66392442 × 700 that is equal 46474709400
+ 66392442 × 3000 that is equal 199177326000
+ 66392442 × 40000 producing 2655697680000
+ 66392442 × 700000 producing 46474709400000
+ 66392442 × 1000000 producing 66392442000000
+ 66392442 × 80000000 what gives us 5311395360000000

= 5427168442193898
