Alright, let's work through 51129919 times 42276451 step by step
51129919 × 42276451 = 42276451 × (51129919)
+ 42276451 × 9 which equals 380488059
+ 42276451 × 10 that is equal 422764510
+ 42276451 × 900 giving us 38048805900
+ 42276451 × 9000 that results in 380488059000
+ 42276451 × 20000 resulting in 845529020000
+ 42276451 × 100000 producing 4227645100000
+ 42276451 × 1000000 what gives us 42276451000000
+ 42276451 × 50000000 that results in 2113822550000000

= 2161591515237469
