A factory now costs 39 yuan per product, which is 25% lower than before. What is the original cost of each product?
某工厂现在每件产品的成本是39元，比原来降低了25%．原来每件产品的成本是多少元？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">39 / (3/4)</gadget>
<output>52</output>

<result>52</result>