A steel rail is (3/5) meters long and weighs (1/20) tons. What is the average length of each ton in meters?
一种钢轨长(3/5)米，重(1/20)吨，平均每吨长多少米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(3/5) / (1/20)</gadget>
<output>12</output>

<result>12</result>