GST Calculator Online
This code creates a GST calculator with two input fields for the price (before tax) and the tax rate (in percentage), respectively. The user can enter the values in these fields and click on the "Calculate" button to get the total price (including tax) in a separate result element. The code also includes basic validation to ensure that the user has entered both the price and tax rate before performing the calculation. The layout is fully responsive and adjusts to smaller screens.