Alright, let's work through 78036396 times 62817484 step by step
78036396 × 62817484 = 62817484 × (78036396)
+ 62817484 × 6 what gives us 376904904
+ 62817484 × 90 yielding 5653573560
+ 62817484 × 300 producing 18845245200
+ 62817484 × 6000 giving us 376904904000
+ 62817484 × 30000 yielding 1884524520000
+ 62817484 × 000000 that results in 0
+ 62817484 × 8000000 that is equal 502539872000000
+ 62817484 × 70000000 yielding 4397223880000000

= 4902050057147664
