How to Create a calculator like this >>>

Hello everyone, I have a site where I need to put a calculator or form like these:

https://boatcrazy.com/valuation

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https://boatvalue.com/get-boat-value/

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https://www.boattrader.com/research/tools/price-checker/

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My knowledge is very basic and I can't find a way to copy that or be able to put it together in some way. Can somebody help me? It would be very helpful to have a calculator like this on my site.

To add the form and generate a result is not so difficult. But you need to have the data base that knows to evaluate the product.
If it's a WP site, maybe you can find a plugin that can assist on that, but you have to put in the data that the calculator needs.