Alright, let's work through 79889448 times 39788176 step by step
79889448 × 39788176 = 39788176 × (79889448)
+ 39788176 × 8 what gives us 318305408
+ 39788176 × 40 that equals 1591527040
+ 39788176 × 400 which equals 15915270400
+ 39788176 × 9000 producing 358093584000
+ 39788176 × 80000 that is equal 3183054080000
+ 39788176 × 800000 giving us 31830540800000
+ 39788176 × 9000000 resulting in 358093584000000
+ 39788176 × 70000000 that is equal 2785172320000000

= 3178655417566848
