Alright, let's work through 78663727 times 38590977 step by step
78663727 × 38590977 = 38590977 × (78663727)
+ 38590977 × 7 that results in 270136839
+ 38590977 × 20 what gives us 771819540
+ 38590977 × 700 giving us 27013683900
+ 38590977 × 3000 what gives us 115772931000
+ 38590977 × 60000 giving us 2315458620000
+ 38590977 × 600000 yielding 23154586200000
+ 38590977 × 8000000 resulting in 308727816000000
+ 38590977 × 70000000 what gives us 2701368390000000

= 3035710079391279
