Alright, let's work through 77500585 times 66942481 step by step
77500585 × 66942481 = 66942481 × (77500585)
+ 66942481 × 5 producing 334712405
+ 66942481 × 80 what gives us 5355398480
+ 66942481 × 500 giving us 33471240500
+ 66942481 × 0000 producing 0
+ 66942481 × 00000 that results in 0
+ 66942481 × 500000 resulting in 33471240500000
+ 66942481 × 7000000 resulting in 468597367000000
+ 66942481 × 70000000 yielding 4685973670000000

= 5188081438851385
