Alright, let's work through 79347719 times 10222731 step by step
79347719 × 10222731 = 10222731 × (79347719)
+ 10222731 × 9 resulting in 92004579
+ 10222731 × 10 yielding 102227310
+ 10222731 × 700 yielding 7155911700
+ 10222731 × 7000 giving us 71559117000
+ 10222731 × 40000 which equals 408909240000
+ 10222731 × 300000 that results in 3066819300000
+ 10222731 × 9000000 giving us 92004579000000
+ 10222731 × 70000000 what gives us 715591170000000

= 811150386800589
