cmd.exe and calc.exe from ReactOS can be used since ReactOS aims to be fully binary compatible. They look a bit bad though. Or this is a good opportunity to us

cmd.exe and calc.exe from ReactOS can be used since ReactOS aims to be fully binary compatible. They look a bit bad though. Or this is a good opportunity to use tools not built into the OS or write own replacements. It's a bit silly to have calc program dictated by the OS version.