Alright, let's work through 81707213 times 45480434 step by step
81707213 × 45480434 = 45480434 × (81707213)
+ 45480434 × 3 which equals 136441302
+ 45480434 × 10 which equals 454804340
+ 45480434 × 200 yielding 9096086800
+ 45480434 × 7000 what gives us 318363038000
+ 45480434 × 00000 producing 0
+ 45480434 × 700000 which equals 31836303800000
+ 45480434 × 1000000 which equals 45480434000000
+ 45480434 × 80000000 what gives us 3638434720000000

= 3716079508170442
