rectangle is obtained by folding a square in half. The length of the rectangle is 8 cm and the width is 4 cm. What is the perimeter of the original square?
把一个正方形对折后得到一个长方形，这个长方形的长是8厘米，宽是4厘米，原来正方形的周长是多少．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>