Alright, let's work through 51093738 times 48656021 step by step
51093738 × 48656021 = 48656021 × (51093738)
+ 48656021 × 8 which equals 389248168
+ 48656021 × 30 producing 1459680630
+ 48656021 × 700 which equals 34059214700
+ 48656021 × 3000 that is equal 145968063000
+ 48656021 × 90000 producing 4379041890000
+ 48656021 × 000000 which equals 0
+ 48656021 × 1000000 producing 48656021000000
+ 48656021 × 50000000 producing 2432801050000000

= 2486017989096498
