Alright, let's work through 81572824 times 42869388 step by step
81572824 × 42869388 = 42869388 × (81572824)
+ 42869388 × 4 yielding 171477552
+ 42869388 × 20 which equals 857387760
+ 42869388 × 800 resulting in 34295510400
+ 42869388 × 2000 producing 85738776000
+ 42869388 × 70000 that equals 3000857160000
+ 42869388 × 500000 producing 21434694000000
+ 42869388 × 1000000 that is equal 42869388000000
+ 42869388 × 80000000 producing 3429551040000000

= 3496977042311712
