<prompt> Calculate the total cost of a product with the given price and tax rate.Price: 20, Tax rate: 10  <response>: The total cost of the product with a price of 20 and a tax rate of 10 would be 22. To calculate this, first calculate the amount of tax by multiplying the price by the tax rate: 20 x 0.10 2. Then, add the amount of tax to the price to find the total cost: 20 2 22. 