Alright, let's work through 8315894 times 79795118 step by step
8315894 × 79795118 = 79795118 × (8315894)
+ 79795118 × 4 that results in 319180472
+ 79795118 × 90 resulting in 7181560620
+ 79795118 × 800 giving us 63836094400
+ 79795118 × 5000 that is equal 398975590000
+ 79795118 × 10000 what gives us 797951180000
+ 79795118 × 300000 what gives us 23938535400000
+ 79795118 × 8000000 which equals 638360944000000

= 663567743005492
