The area of a rectangle is (3/5) square meters, its width is (1/5) meters, and its length is in meters.
一个长方形的面积是(3/5)平方米，它的宽是(1/5)米，长是多少米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<result>3</result>