If a product is sold at 30% off the original price, a profit of 12% can still be obtained; if it is sold at the original price, the profit obtained is the amount of the purchase price
某商品按原定价的七折出售，仍能获得12%的利润；若按原定价出售，所获利润是进价的多少
<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">1 + (3/25)</gadget>
<output>28/25 = around 1.12</output>

<gadget id="calculator">1 / 0.7</gadget>
<output>1.428571</output>

<gadget id="calculator">(28/25) * 1.428571</gadget>
<output>1.6</output>

<gadget id="calculator">1.6 - 1</gadget>
<output>0.6</output>

<gadget id="calculator">0.6 / 1</gadget>
<output>0.6</output>

<result>0.6</result>