Last week Xiaoying bought a new piano for 7650 yuan. My mother told others: "I bought this piano after the price was reduced by 10%." Do you know how much this piano originally cost?
上个星期小英家用7650元新买了一架钢琴．妈妈告诉别人说："这架钢琴降价了10%后我才买的．"你知道这架钢琴原来要卖多少元吗？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">7_650 / (9/10)</gadget>
<output>8_500</output>

<result>8_500</result>