Alright, let's work through 51522812 times 97828728 step by step
51522812 × 97828728 = 97828728 × (51522812)
+ 97828728 × 2 which equals 195657456
+ 97828728 × 10 that results in 978287280
+ 97828728 × 800 yielding 78262982400
+ 97828728 × 2000 producing 195657456000
+ 97828728 × 20000 that is equal 1956574560000
+ 97828728 × 500000 resulting in 48914364000000
+ 97828728 × 1000000 producing 97828728000000
+ 97828728 × 50000000 resulting in 4891436400000000

= 5040411160943136
