The side length of a square is (1/2) meter, what is its perimeter in meters
一个正方形的边长是(1/2)米，它的周长是多少米
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 4</gadget>
<output>2</output>

<result>2</result>