product is priced at 50% profit, and the selling price is 60 yuan. What is the cost price of this product?
某商品按50%的利润定价，售价是60元，这件商品的成本价是多少元．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">60 / (3/2)</gadget>
<output>40</output>

<result>40</result>