Alright, let's work through 80093813 times 39520031 step by step
80093813 × 39520031 = 39520031 × (80093813)
+ 39520031 × 3 giving us 118560093
+ 39520031 × 10 resulting in 395200310
+ 39520031 × 800 which equals 31616024800
+ 39520031 × 3000 resulting in 118560093000
+ 39520031 × 90000 which equals 3556802790000
+ 39520031 × 000000 what gives us 0
+ 39520031 × 0000000 producing 0
+ 39520031 × 80000000 that results in 3161602480000000

= 3165309972668203
