Alright, let's work through 81907281 times 45713333 step by step
81907281 × 45713333 = 45713333 × (81907281)
+ 45713333 × 1 that results in 45713333
+ 45713333 × 80 yielding 3657066640
+ 45713333 × 200 giving us 9142666600
+ 45713333 × 7000 that equals 319993331000
+ 45713333 × 00000 yielding 0
+ 45713333 × 900000 producing 41141999700000
+ 45713333 × 1000000 that is equal 45713333000000
+ 45713333 × 80000000 yielding 3657066640000000

= 3744254811477573
