Alright, let's work through 7879681 times 97255415 step by step
7879681 × 97255415 = 97255415 × (7879681)
+ 97255415 × 1 what gives us 97255415
+ 97255415 × 80 resulting in 7780433200
+ 97255415 × 600 giving us 58353249000
+ 97255415 × 9000 giving us 875298735000
+ 97255415 × 70000 which equals 6807879050000
+ 97255415 × 800000 giving us 77804332000000
+ 97255415 × 7000000 that equals 680787905000000

= 766341645722615
