Code a calculator for a webpage based on a VBA demo of calculator requirements

I have the requirement for a calculator to be added to a webpage. However this calculator is more complex than a standard calculator which produces an output by applying user inputs to an equation. As a result of these complexities there is no known equation and so simulations will need to be run based on the user’s inputs to produce outputs which are based on average results from the simulations.

This calculator has been coded in an excel userform with VBA to demonstrate how the calculator should function, the successful applicant will therefore have to have an understanding of VBA code to understand the requirements.

As a result, the simulations from the VBA script should be echoed within the new code so that it can be produced on a webpage (possible HTML, javascript, PHP).

Thanks