Let's calculate 83165683 x 64878413
83165683 × 64878413 = 64878413 × (83165683)
+ 64878413 × 3 producing 194635239
+ 64878413 × 80 producing 5190273040
+ 64878413 × 600 which equals 38927047800
+ 64878413 × 5000 which equals 324392065000
+ 64878413 × 60000 that equals 3892704780000
+ 64878413 × 100000 yielding 6487841300000
+ 64878413 × 3000000 that is equal 194635239000000
+ 64878413 × 80000000 which equals 5190273040000000

= 5395657529101079
