A commodity is sold at a 20% discount first, and then with a 10% discount. At this time, the price is 360 yuan. How much is the original price of the commodity?
一种商品，先降价20%出售，后又打九折，这时售价360元，商品原价多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">360 / (9/10) / (4/5)</gadget>
<output>500</output>

<result>500</result>