I always thought it would be interesting to see a calculator that takes a finished product and shows how many raw resources went into it. For example, put in a

I always thought it would be interesting to see a calculator that takes a finished product and shows how many raw resources went into it. For example, put in a load of bread, and it shows how big of a wheat field it needed, how much oil to transport it to market, etc. Put in a cell phone and it shows how many minerals were mined. Showing labor hours would also be neat. Just a few examples for products across different sectors would be interesting.