Alright, let's work through 78714815 times 65782032 step by step
78714815 × 65782032 = 65782032 × (78714815)
+ 65782032 × 5 which equals 328910160
+ 65782032 × 10 that is equal 657820320
+ 65782032 × 800 what gives us 52625625600
+ 65782032 × 4000 giving us 263128128000
+ 65782032 × 10000 giving us 657820320000
+ 65782032 × 700000 that is equal 46047422400000
+ 65782032 × 8000000 what gives us 526256256000000
+ 65782032 × 70000000 which equals 4604742240000000

= 5178020479204080
