Alright, let's work through 81385648 times 42671044 step by step
81385648 × 42671044 = 42671044 × (81385648)
+ 42671044 × 8 which equals 341368352
+ 42671044 × 40 resulting in 1706841760
+ 42671044 × 600 which equals 25602626400
+ 42671044 × 5000 producing 213355220000
+ 42671044 × 80000 that is equal 3413683520000
+ 42671044 × 300000 what gives us 12801313200000
+ 42671044 × 1000000 resulting in 42671044000000
+ 42671044 × 80000000 producing 3413683520000000

= 3472810566776512
