Alright, let's work through 78964614 times 98940039 step by step
78964614 × 98940039 = 98940039 × (78964614)
+ 98940039 × 4 that results in 395760156
+ 98940039 × 10 which equals 989400390
+ 98940039 × 600 which equals 59364023400
+ 98940039 × 4000 that equals 395760156000
+ 98940039 × 60000 producing 5936402340000
+ 98940039 × 900000 yielding 89046035100000
+ 98940039 × 8000000 which equals 791520312000000
+ 98940039 × 70000000 that equals 6925802730000000

= 7812761988779946
