If a commodity is priced at 20 yuan per piece, the profit can be 25%. If you want to make a profit of 50% per commodity, how much should each commodity be priced at?
一种商品如果每件定价20元，可盈利25%，如果想每件商品盈利50%，则每件商品定价应为多少元．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">20 / (5/4)</gadget>
<output>16</output>

<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">16 * (3/2)</gadget>
<output>24</output>

<result>24</result>