A rectangle is (1/4) meter long and (1/6) meter wide, what is its perimeter in meters?
一个长方形，长是(1/4)米，宽是(1/6)米，它的周长是多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/4) + (1/6)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(5/12) * 2</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>