If one of the followings is the product of the two 3-digit integers 8L7 and 6K9 (K and L denote the tens digit of the respective integers), then that product must be  Choose the correct option:
A) 511,913  B) 478,823  C) 531,875  D) 538,424  E) 569,114
To know the unit digit you can multiply both digit number: 7 x 9 = 63   This eliminates C, D, and E, because the number must end with a 3   To know the answer you can multiply both the thousand digit giving 8 x 6 = 48 so the number must be bigger than 480.000.   So the answer is 511,913
<result>A</result>
If one of the followings is the product of the two 3-digit integers 8L7 and 6K9 (K and L denote the tens digit of the respective integers), then that product must be