How do I dowload the Apple Calculator app on iPadOS 18.0.1?

I upgraded my 9th generation iPad to IOS 18.01 but the calculator app downloaded with the upgrade does not look like it’s from Apple. I checked in the AppStore and it does say that the developer is Apple. However, there are ads at the bottom of the screen and in settings there are options for paid upgrades. It does not look at all like the one shown on the Apple website. This is what it looks like. Where can I download the correct one? Thx

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