Alright, let's work through 38391375 times 51887001 step by step
38391375 × 51887001 = 51887001 × (38391375)
+ 51887001 × 5 giving us 259435005
+ 51887001 × 70 yielding 3632090070
+ 51887001 × 300 producing 15566100300
+ 51887001 × 1000 what gives us 51887001000
+ 51887001 × 90000 that results in 4669830090000
+ 51887001 × 300000 that equals 15566100300000
+ 51887001 × 8000000 that is equal 415096008000000
+ 51887001 × 30000000 that equals 1556610030000000

= 1992013313016375
