store sells "Aigao" brand height-increasing shoes. The original price is 880 yuan per pair. In fact, selling the store at the current price still makes a profit of 10%. Ask for the cost price of "Aigao" brand height-increasing shoes.
某商店销售"爱高"牌增高鞋，原价为每双880元，近日商店打出"亏本大甩卖"的广告，在原价的基础上6折出售．事实上，以现价销售该商店仍盈利10%，求"爱高"牌增高鞋的成本价．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(3/5) / (11/10)</gadget>
<output>6/11 = around 0.545455</output>

<gadget id="calculator">880 * (6/11)</gadget>
<output>480</output>

<result>480</result>