Alright, let's work through 78500485 times 47089483 step by step
78500485 × 47089483 = 47089483 × (78500485)
+ 47089483 × 5 that results in 235447415
+ 47089483 × 80 which equals 3767158640
+ 47089483 × 400 yielding 18835793200
+ 47089483 × 0000 what gives us 0
+ 47089483 × 00000 that equals 0
+ 47089483 × 500000 giving us 23544741500000
+ 47089483 × 8000000 resulting in 376715864000000
+ 47089483 × 70000000 producing 3296263810000000

= 3696547253899255
