A clothing store sells all the clothes at a 10% discount. If you have a membership card of the store, the discount will be 15% on top of the 10% discount. Aunt Wang has a membership card of the store. She bought a set of clothes and saved 56.4 yuan from the original price. How much is the price of this set of clothes?
一家服装专卖店的服装全部打九折出售，如果有该店的会员卡，在打九折的基础上再便宜15%，王阿姨有该店的会员卡．她买了一套服装比原标价节省了56.4元，这套服装的标价是多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">(9/10) * (17/20)</gadget>
<output>153/200 = around 0.765</output>

<gadget id="calculator">1 - (153/200)</gadget>
<output>47/200 = around 0.235</output>

<gadget id="calculator">56.4 / (47/200)</gadget>
<output>240</output>

<result>240</result>