Hello, how are you?
Try installing the calculator again following the procedure below.
- Press Windows+X and select Windows PowerShell (Admin);
- Type the commands below and press Enter one by one:
Get-AppxPackage *windowscalculator* | Remove-AppxPackage [Enter]
Get-AppxPackage -allusers *windowscalculator* | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”} [Enter]
After that, check if it was installed again.