Alright, let's work through 78647645 times 29685361 step by step
78647645 × 29685361 = 29685361 × (78647645)
+ 29685361 × 5 yielding 148426805
+ 29685361 × 40 yielding 1187414440
+ 29685361 × 600 resulting in 17811216600
+ 29685361 × 7000 resulting in 207797527000
+ 29685361 × 40000 producing 1187414440000
+ 29685361 × 600000 yielding 17811216600000
+ 29685361 × 8000000 producing 237482888000000
+ 29685361 × 70000000 what gives us 2077975270000000

= 2334683733624845
