A store has a bicycle that sells for 500 yuan. In order to promote sales, the store first raises the price by 5%, and then sells it at a 20% discount. How much is the store’s profit?
商店有一款售价为500元的自行车，商店为了搞促销，先提价5%，再八折销售，最后商店让利多少元？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 + (1/20)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">500 * (21/20) * (4/5)</gadget>
<output>420</output>

<gadget id="calculator">500 - 420</gadget>
<output>80</output>

<result>80</result>