You can use the search bar for quick calculations. That doesn’t escuses Apple from adding an calculator app on iPad! Most calculator apps have ads or are paid
Like I said, I only do this once a year, other washes are done just with a pressure washer and a foam canon, sometimes when the car gets really dirty I use a mitt wash with shampoo after the foam canon.
Cycling. I started with a bike that was given to me by my uncle. Now I have a road bike, full equipment x3, a direct drive trainer for the rainy days and a subscription to use that.
Thanks! Just ordered a copy from eBay!