The side length of a square is (1/5) meter, what is its perimeter in meters?
一个正方形的边长是(1/5)米，它的周长是多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 4</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>