Alright, let's work through 84712664 times 66757563 step by step
84712664 × 66757563 = 66757563 × (84712664)
+ 66757563 × 4 giving us 267030252
+ 66757563 × 60 which equals 4005453780
+ 66757563 × 600 yielding 40054537800
+ 66757563 × 2000 which equals 133515126000
+ 66757563 × 10000 what gives us 667575630000
+ 66757563 × 700000 giving us 46730294100000
+ 66757563 × 4000000 that is equal 267030252000000
+ 66757563 × 80000000 that results in 5340605040000000

= 5655211003877832
