Alright, let's work through 83656488 times 80393494 step by step
83656488 × 80393494 = 80393494 × (83656488)
+ 80393494 × 8 producing 643147952
+ 80393494 × 80 that results in 6431479520
+ 80393494 × 400 what gives us 32157397600
+ 80393494 × 6000 that results in 482360964000
+ 80393494 × 50000 producing 4019674700000
+ 80393494 × 600000 that results in 48236096400000
+ 80393494 × 3000000 that is equal 241180482000000
+ 80393494 × 80000000 giving us 6431479520000000

= 6725437366089072
