Alright, let's work through 78996759 times 15988856 step by step
78996759 × 15988856 = 15988856 × (78996759)
+ 15988856 × 9 resulting in 143899704
+ 15988856 × 50 which equals 799442800
+ 15988856 × 700 yielding 11192199200
+ 15988856 × 6000 resulting in 95933136000
+ 15988856 × 90000 producing 1438997040000
+ 15988856 × 900000 producing 14389970400000
+ 15988856 × 8000000 that is equal 127910848000000
+ 15988856 × 70000000 giving us 1119219920000000

= 1263067804117704
