Level 112 is another stage in "100 Doors 2013" that was included in the recent update. The number of levels has been increased to 119 but what we will discuss in this page is only the solution for 112. However, all of the other answers to other stages are covered in a different post. Links will be provided at the bottom of this article. By the way, this game is available for
Android and the iOS.
Here is the written guide for this particular level if you need it. Read carefully and follow the steps:
Notice the equation above the door. It is asking you to solve for cosX + SinY. If you look at the numbers on the sides of the door you will see 12641 & 85328. Add those numbers up to get the answer 97969 which is the code that you have to enter into the keypad.
Moreover, here is a video explaining further how to solve this puzzle.
Also see
walkthrough to 100 Doors 2013 level 111 if you also need answers to that level.