Alright, let's work through 78456385 times 87271675 step by step
78456385 × 87271675 = 87271675 × (78456385)
+ 87271675 × 5 that is equal 436358375
+ 87271675 × 80 giving us 6981734000
+ 87271675 × 300 which equals 26181502500
+ 87271675 × 6000 what gives us 523630050000
+ 87271675 × 50000 which equals 4363583750000
+ 87271675 × 400000 that is equal 34908670000000
+ 87271675 × 8000000 what gives us 698173400000000
+ 87271675 × 70000000 producing 6109017250000000

= 6847020133394875
