A steel rail is (4/5) meters long and weighs (4/25) tons. What is the weight of this steel rail per meter?
一种钢轨长(4/5)米，重(4/25)吨，这种钢轨1米重多少吨．
<gadget id="calculator">4 / 25</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/25) / (4/5)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>