A microwave oven sells for 360 yuan, which is 20% lower than the original price. How much is the original price?
一种微波炉售价360元，比原来降价20%，原价多少元？
<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 / (4/5)</gadget>
<output>450</output>

<result>450</result>