Alright, let's work through 78755404 times 78015085 step by step
78755404 × 78015085 = 78015085 × (78755404)
+ 78015085 × 4 that is equal 312060340
+ 78015085 × 00 giving us 0
+ 78015085 × 400 that is equal 31206034000
+ 78015085 × 5000 resulting in 390075425000
+ 78015085 × 50000 that results in 3900754250000
+ 78015085 × 700000 giving us 54610559500000
+ 78015085 × 8000000 that results in 624120680000000
+ 78015085 × 70000000 which equals 5461055950000000

= 6144109537269340
