Alright, let's work through 79890786 times 40160423 step by step
79890786 × 40160423 = 40160423 × (79890786)
+ 40160423 × 6 producing 240962538
+ 40160423 × 80 which equals 3212833840
+ 40160423 × 700 resulting in 28112296100
+ 40160423 × 0000 producing 0
+ 40160423 × 90000 that results in 3614438070000
+ 40160423 × 800000 resulting in 32128338400000
+ 40160423 × 9000000 resulting in 361443807000000
+ 40160423 × 70000000 what gives us 2811229610000000

= 3208447759562478
