People usually put their treasures or very important documents in a strongbox, cause a deposit box is very heavy and very hard to open it up, unless you open it by a saw, otherwise it wouldn’t open that easy. One day Mr. O’malley saw a strongbox in a corner on the street, he was very curious about what is it inside. So he need someone to open it for him, would you like to do him a favor? He will shares half of the treasures with you. Use you brain and get the number to unlock the lock. Good luck to you!