File list (Check if you may need any files):
Calculator_project
..................\Project1.cfg
..................\Project1.dof
..................\Project1.dpr
..................\Project1.exe
..................\Project1.res
..................\Project1.~dpr
..................\Unit1.dcu
..................\Unit1.ddp
..................\Unit1.dfm
..................\Unit1.pas
..................\Unit1.~ddp
..................\Unit1.~dfm
..................\Unit1.~pas
..................\Unit2.dcu
..................\Unit2.dfm
..................\Unit2.pas
..................\Unit2.~dfm
..................\Unit2.~pas
..................\Unit3.dcu
..................\Unit3.pas
..................\Unit3.~pas