Alright, let's work through 78159738 times 77047835 step by step
78159738 × 77047835 = 77047835 × (78159738)
+ 77047835 × 8 that results in 616382680
+ 77047835 × 30 yielding 2311435050
+ 77047835 × 700 that is equal 53933484500
+ 77047835 × 9000 that is equal 693430515000
+ 77047835 × 50000 what gives us 3852391750000
+ 77047835 × 100000 which equals 7704783500000
+ 77047835 × 8000000 that equals 616382680000000
+ 77047835 × 70000000 giving us 5393348450000000

= 6022038597067230
