Alright, let's work through 51000389 times 75488655 step by step
51000389 × 75488655 = 75488655 × (51000389)
+ 75488655 × 9 what gives us 679397895
+ 75488655 × 80 giving us 6039092400
+ 75488655 × 300 that is equal 22646596500
+ 75488655 × 0000 yielding 0
+ 75488655 × 00000 which equals 0
+ 75488655 × 000000 which equals 0
+ 75488655 × 1000000 resulting in 75488655000000
+ 75488655 × 50000000 producing 3774432750000000

= 3849950770086795
