Wenfeng World holds a limited-time special sale every day from 3:00 to 5:00 pm. An MP4 with a price tag of 900 yuan will still earn 20% after a 20% discount. How much money can you earn if you sell it at the listed price?
文峰大世界每天下午3：00-5：00举行限时特卖活动，一只标价900元的MP4，打八折后仍赚20%．如果就按标价出售，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>