Here is the S4 dark calculator for S3 (only Sammy Roms)
After flashing check in system/app to see if permissions are correct for the apk and don´t forget to delete SecCalculator2.apk
Not responsible for anything that happens to your phone!
If you prefer the white version of Arsaw here is the link http://www.mediafire.com/?fc1hfa41fbibek9
Arsaw for the working version of the calculator
Tested and working on Wanam 7.0