300 tons of ore makes 165 tons of iron, what is the iron content
300吨矿石炼铁165吨，含铁率多少
<gadget id="calculator">165 / 300</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(11/20) * 1</gadget>
<output>11/20 = around 0.55</output>

<result>11/20 = around 0.55</result>