How Do I make a 3D Numbered Padlock?

Since I'm very new to Unity and c# I'm working on creating an escape room style game. Unfortunately I cannot figure out how to make a padlock. I want this padlock to be stationary on a door and to remove the door when a four digit number has been entered. Any help would be very much appreciated! By the way this will be a 3d VR game and the player will be in an XR Rig.