"Thanksgiving" discount clothing will be reduced by 30%. I have a discount card and can get another 10% discount. Mom bought a set of clothes for 315 yuan. How much is the original price of this suit?
"感恩节"酬宾服装一律降价30%，我有优惠卡还可以再打九折，妈妈买了一套衣服花了315元钱，这套衣服原价是多少元？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(7/10) * (9/10)</gadget>
<output>63/100 = around 0.63</output>

<gadget id="calculator">315 / (63/100)</gadget>
<output>500</output>

<result>500</result>