Bazhong Datong Clothing held a special sale event. A coat with a price tag of 900 yuan can still earn 20% after a 20% discount.
巴中大通服饰举行特卖活动，一件标价900元的上衣，打八折后仍赚20%，如果按标价出售，则可赚多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">900 * (4/5)</gadget>
<output>720</output>

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

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">720 / (6/5)</gadget>
<output>600</output>

<gadget id="calculator">900 - 600</gadget>
<output>300</output>

<result>300</result>