Alright, let's work through 77838104 times 96878680 step by step
77838104 × 96878680 = 96878680 × (77838104)
+ 96878680 × 4 producing 387514720
+ 96878680 × 00 what gives us 0
+ 96878680 × 100 resulting in 9687868000
+ 96878680 × 8000 yielding 775029440000
+ 96878680 × 30000 resulting in 2906360400000
+ 96878680 × 800000 which equals 77502944000000
+ 96878680 × 7000000 what gives us 678150760000000
+ 96878680 × 70000000 giving us 6781507600000000

= 7540852769222720
