The conversation between human and AI assistant.
[|Human|] Given a product's price and tax rate, calculate the product's price with tax
[|AI|] The tax amount for the product would be $120 * 0.05 = $6. Therefore, the price of the product including tax would be $120 + $6 = $126.
[|Human|] 
Given a product's price and tax rate, calculate the product's price with tax