Alright, let's work through 80321442 times 81141412 step by step
80321442 × 81141412 = 81141412 × (80321442)
+ 81141412 × 2 what gives us 162282824
+ 81141412 × 40 what gives us 3245656480
+ 81141412 × 400 producing 32456564800
+ 81141412 × 1000 resulting in 81141412000
+ 81141412 × 20000 that equals 1622828240000
+ 81141412 × 300000 that is equal 24342423600000
+ 81141412 × 0000000 which equals 0
+ 81141412 × 80000000 resulting in 6491312960000000

= 6517395217756104
