Alright, let's work through 78089474 times 4864776 step by step
78089474 × 4864776 = 4864776 × (78089474)
+ 4864776 × 4 that is equal 19459104
+ 4864776 × 70 that equals 340534320
+ 4864776 × 400 producing 1945910400
+ 4864776 × 9000 that results in 43782984000
+ 4864776 × 80000 giving us 389182080000
+ 4864776 × 000000 yielding 0
+ 4864776 × 8000000 what gives us 38918208000000
+ 4864776 × 70000000 giving us 340534320000000

= 379887798967824
