The profit rate of a piece of clothing is 20%. If it is sold at a 10% discount, it can still make a profit of 24 yuan. What is the cost of this piece of clothing?
一件衣服的利润率为20%，若打九折出售，仍能盈利24元，这件衣服的成本为多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">24 / (1/10)</gadget>
<output>240</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">240 / (6/5)</gadget>
<output>200</output>

<result>200</result>