Alright, let's work through 78488328 times 39133757 step by step
78488328 × 39133757 = 39133757 × (78488328)
+ 39133757 × 8 producing 313070056
+ 39133757 × 20 resulting in 782675140
+ 39133757 × 300 giving us 11740127100
+ 39133757 × 8000 which equals 313070056000
+ 39133757 × 80000 giving us 3130700560000
+ 39133757 × 400000 which equals 15653502800000
+ 39133757 × 8000000 resulting in 313070056000000
+ 39133757 × 70000000 yielding 2739362990000000

= 3071543155288296
