Alright, let's work through 51385138 times 73065366 step by step
51385138 × 73065366 = 73065366 × (51385138)
+ 73065366 × 8 producing 584522928
+ 73065366 × 30 what gives us 2191960980
+ 73065366 × 100 what gives us 7306536600
+ 73065366 × 5000 resulting in 365326830000
+ 73065366 × 80000 that results in 5845229280000
+ 73065366 × 300000 yielding 21919609800000
+ 73065366 × 1000000 what gives us 73065366000000
+ 73065366 × 50000000 yielding 3653268300000000

= 3754473914930508
