Alright, let's work through 79564427 times 80674845 step by step
79564427 × 80674845 = 80674845 × (79564427)
+ 80674845 × 7 yielding 564723915
+ 80674845 × 20 yielding 1613496900
+ 80674845 × 400 giving us 32269938000
+ 80674845 × 4000 that is equal 322699380000
+ 80674845 × 60000 which equals 4840490700000
+ 80674845 × 500000 giving us 40337422500000
+ 80674845 × 9000000 that equals 726073605000000
+ 80674845 × 70000000 resulting in 5647239150000000

= 6418847815738815
