A store increases the cost price of a certain type of leather shoes by 40% as the price, and sells them at a discount of 20% off the price. As a result, each pair of leather shoes can still make a profit of 24 yuan. How much is the cost price of this kind of leather shoes?
某商店将某种皮鞋按成本价提高4成作为标价，又以标价的8折优惠卖出，结果每双皮鞋仍可获利24元，问这种皮鞋的成本价为多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(4/5) * (2/5)</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">(8/25) - 1</gadget>
<output>-17/25 = around -0.68</output>

<gadget id="calculator">(4/5) + (-17/25)</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">24 / (3/25)</gadget>
<output>200</output>

<result>200</result>