If a product is sold at the fixed price, it will earn 60 yuan. If it is sold at a 20% discount, it will lose 20 yuan. What is the price of this product?
某种商品按定价出售，会赚60元，如果八折出售，就会亏损20元，求这件商品的定价是多少元？
<gadget id="calculator">60 + 20</gadget>
<output>80</output>

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

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">80 / (1/5)</gadget>
<output>400</output>

<result>400</result>