Alright, let's work through 51396516 times 42342414 step by step
51396516 × 42342414 = 42342414 × (51396516)
+ 42342414 × 6 that equals 254054484
+ 42342414 × 10 producing 423424140
+ 42342414 × 500 yielding 21171207000
+ 42342414 × 6000 what gives us 254054484000
+ 42342414 × 90000 giving us 3810817260000
+ 42342414 × 300000 yielding 12702724200000
+ 42342414 × 1000000 giving us 42342414000000
+ 42342414 × 50000000 which equals 2117120700000000

= 2176252558629624
